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Willy Underberg

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F W Alexander Tempels; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
Design and applications of coupled SPE-CE.
F W Alexander Tempels; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
On-line coupling of SPE and CE-MS for peptide analysis.
Constantinos Zacharis; F W Alexander Tempels; Georgios Theodoridis; Anastasios N Voulgaropoulos; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
Coupling of sequential injection analysis and capillary electrophoresis - Laser-induced fluorescence via a valve interface for on-line derivatization and analysis of amino acids and peptides.

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2008: F W Alexander Tempels; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
Design and applications of coupled SPE-CE.
Electrophoresis 2008;29(1):108-28.
2007: F W Alexander Tempels; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
On-line coupling of SPE and CE-MS for peptide analysis.
Electrophoresis 2007;28(9):1319-26.
2006: Constantinos Zacharis; F W Alexander Tempels; Georgios Theodoridis; Anastasios N Voulgaropoulos; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
Coupling of sequential injection analysis and capillary electrophoresis - Laser-induced fluorescence via a valve interface for on-line derivatization and analysis of amino acids and peptides.
Journal of chromatography. A 2006;1132(1-2):297-303.
2006: F W Alexander Tempels; Gerard Wiese; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
On-line coupling of size exclusion chromatography and capillary electrophoresis via solid-phase extraction and a Tee-split interface.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences 2006;839(1-2):30-5.
2005: Thom Stroink; Mireya Castillo Ortiz; Auke Bult; Henk Lingeman; Gerhardus J De Jong; Willy J M Underberg
On-line multidimensional liquid chromatography and capillary electrophoresis systems for peptides and proteins.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences 2005;817(1):49-66.
2004: F W Alexander Tempels; Jan Teeuwsen; Ioannis K Kyriakou; Georgios Theodoridis; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
Chromatographic preconcentration coupled on-line to capillary electrophoresis via a tee-split interface.
Journal of chromatography. A 2004;1053(1-2):263-8.
2004: F W Alexander Tempels; Willy J M Underberg; Govert W Somsen; Gerhardus J De Jong
Chromatographic preconcentration coupled to capillary electrophoresis via an in-line injection valve.
Analytical chemistry 2004;76(15):4432-6.
2003: Thom Stroink; Pim Schravendijk; Gerard Wiese; Jan Teeuwsen; Henk Lingeman; Joop C M Waterval; Auke Bult; Gerhardus J De Jong; Willy J M Underberg
On-line coupling of size-exclusion chromatography and capillary zone electrophoresis via a reversed-phase C18 trapping column for the determination of peptides in biological samples.
Electrophoresis 2003;24(6):1126-34.
2003: Thom Stroink; Gerard Wiese; Jan Teeuwsen; Henk Lingeman; Joop C M Waterval; Auke Bult; Gerhardus J De Jong; Willy J M Underberg
On-line coupling of size exclusion and capillary zone electrophoresis via a reversed-phase C18 trapping column for the analysis of structurally related enkephalins in cerebrospinal fluid.
Electrophoresis 2003;24(5):897-903.
2002: Thom Stroink; Gerard Wiese; Jan Teeuwsen; Henk Lingeman; Joop C M Waterval; Auke Bult; Gerhardus J De Jong; Willy J M Underberg
On-line coupling of SEC and RP-LC for the determination of structurally related enkephalins in cerebrospinal fluid.
Journal of pharmaceutical and biomedical analysis 2002;30(4):1393-401.
2002: Willy J M Underberg; Joop C M Waterval
Derivatization trends in capillary electrophoresis: an update.
Electrophoresis 2002;23(22-23):3922-33.
2002: E A A M Vernooij; J Jantina Kettenes-van den Bosch; Willy J M Underberg; Daan J A Crommelin
Chemical hydrolysis of DOTAP and DOPE in a liposomal environment.
Journal of controlled release : official journal of the Controlled Release Society 2002;79(1-3):299-303.
2002: Carolien M Boone; Giulia Manetto; Franco Tagliaro; Joop C M Waterval; Willy J M Underberg; Jan Piet Franke; Rokus A de Zeeuw; Kees Ensing
Interlaboratory reproducibility of mobility parameters in capillary electrophoresis for substance identification in systematic toxicological analysis.
Electrophoresis 2002;23(1):67-73.
2001: Jenny A Cadée; Mies J van Steenbergen; Cees Versluis; albert heck; Willy J M Underberg; Willem Den Otter; Wim Jiskoot; Wim E Hennink
Oxidation of recombinant human interleukin-2 by potassium peroxodisulfate.
Pharmaceutical research 2001;18(10):1461-7.
2001: Joop C M Waterval; G Hommels; P Bestebreurtje; Cees Versluis; albert heck; Auke Bult; Henk Lingeman; Willy J M Underberg
Capillary electrophoretic bioanalysis of therapeutically active peptides with UV and mass spectrometric detection after on-capillary preconcentration.
Electrophoresis 2001;22(13):2709-16.
2001: Joop C M Waterval; P Bestebreurtje; Henk Lingeman; Cees Versluis; albert heck; Auke Bult; Willy J M Underberg
Robust and cost-effective capillary electrophoresis-mass spectrometry interfaces suitable for combination with on-line analyte preconcentration.
Electrophoresis 2001;22(13):2701-8.
2001: Thom Stroink; E Paarlberg; Joop C M Waterval; Auke Bult; Willy J M Underberg
On-line sample preconcentration in capillary electrophoresis, focused on the determination of proteins and peptides.
Electrophoresis 2001;22(12):2375-83.
2001: Joop C M Waterval; J C Bloks; Rolf W Sparidans; Jos H Beijnen; Ignacio Rodríguez-Campos; Auke Bult; Henk Lingeman; Willy J M Underberg
Degradation kinetics of aplidine, a new marine antitumoural cyclic peptide, in aqueous solution.
Journal of chromatography. B, Biomedical sciences and applications 2001;754(1):161-8.
2000: Joop C M Waterval; Henk Lingeman; Auke Bult; Willy J M Underberg
Derivatization trends in capillary electrophoresis.
Electrophoresis 2000;21(18):4029-45.
2000: Joop C M Waterval; G Hommels; Jan Teeuwsen; Auke Bult; Henk Lingeman; Willy J M Underberg
Quantitative analysis of pharmaceutically active peptides using on-capillary analyte preconcentration transient isotachophoresis.
Electrophoresis 2000;21(14):2851-8.
2000: Willy J M Underberg; MA Hoitink; JL Reubsaet; Joop C M Waterval
Separation and detection techniques for peptides and proteins in stability research and bioanalysis.
Journal of chromatography. B, Biomedical sciences and applications 2000;742(2):401-9.
2000: MA Hoitink; Jos H Beijnen; Auke Bult; J M Damen; OA van der Houwen; John A W Kruijtzer; Matthijs M Tibben; Gerard Wiese; Willy J M Underberg
Degradation of azaglycinamido residues in model tripeptides derived from goserelin.
Journal of pharmaceutical sciences 2000;89(1):108-14.
1999: Joop C M Waterval; H Krabbe; Jan Teeuwsen; Auke Bult; Henk Lingeman; Willy J M Underberg
Comparison between transient isotachophoretic capillary zone electrophoresis and reversed-phase liquid chromatography for the determination of peptides in plasma.
Electrophoresis 1999;20(14):2909-16.
1999: Carolien M Boone; Joop C M Waterval; Henk Lingeman; Kees Ensing; Willy J M Underberg
Capillary electrophoresis as a versatile tool for the bioanalysis of drugs--a review.
Journal of pharmaceutical and biomedical analysis 1999;20(6):831-63.
1999: C Sluiter; J Jantina Kettenes-van den Bosch; E Hop; OA van der Houwen; Willy J M Underberg; Auke Bult
Degradation study of the investigational anticancer drug clanfenur.
International journal of pharmaceutics 1999;185(2):227-35.
1999: J Léon; E Reubsaet; Jos H Beijnen; Wouter P van Bennekom; Auke Bult; Anne Hoekstra; E Hop; P J van Os; Jan Teeuwsen; Willy J M Underberg
Reduction of Cys36-Cys42 and Cys64-Cys74 disulfide bonds in recombinant human granulocyte colony stimulating factor.
Journal of pharmaceutical and biomedical analysis 1999;19(6):837-45.
1999: Christien Oussoren; Mauro Magnani; Alessandra Fraternale; Anna Casabianca; Laura Chiarantini; R Ingebrigsten; Willy J M Underberg; Gert Storm
Liposomes as carriers of the antiretroviral agent dideoxycytidine-5'-triphosphate.
International journal of pharmaceutics 1999;180(2):261-70.
1999: JL Reubsaet; Jos H Beijnen; E H Belshof; M Bouyakhrichan; Auke Bult; E Hop; Y Kellekule; RJ van Maanen; Jan Teeuwsen; Willy J M Underberg
Qualitative and quantitative aspects of the degradation of several tripeptides derived from the antitumour peptide antagonist [Arg(6), D-Trp(7,9), MePhe(8)] substance P[6-11].
Journal of pharmaceutical and biomedical analysis 1999;19(3-4):277-84.
1998: Joop C M Waterval; C J la Porte; R van 't Hof; Jan Teeuwsen; Auke Bult; Henk Lingeman; Willy J M Underberg
Development and validation of transient isotachophoretic capillary zone electrophoresis for determination of peptides.
Electrophoresis 1998;19(18):3171-7.
1998: FJ Koppenhagen; Gert Storm; Willy J M Underberg
Development of a routine analysis method for liposome encapsulated recombinant interleukin-2.
Journal of chromatography. B, Biomedical sciences and applications 1998;716(1-2):285-91.
1998: JL Reubsaet; Jos H Beijnen; Auke Bult; RJ van Maanen; J A Marchal; Willy J M Underberg
Analytical techniques used to study the degradation of proteins and peptides: physical instability.
Journal of pharmaceutical and biomedical analysis 1998;17(6-7):979-84.
1998: JL Reubsaet; Jos H Beijnen; Auke Bult; RJ van Maanen; J A Marchal; Willy J M Underberg
Analytical techniques used to study the degradation of proteins and peptides: chemical instability.
Journal of pharmaceutical and biomedical analysis 1998;17(6-7):955-78.
1998: MA Hoitink; Jos H Beijnen; M U Boschma; Auke Bult; OA van der Houwen; Gerard Wiese; Willy J M Underberg
Degradation kinetics of three gonadorelin analogues: developing a method for calculating epimerization parameters.
Pharmaceutical research 1998;15(9):1449-55.
1998: JL Reubsaet; Jos H Beijnen; Auke Bult; E Hop; S D Scholten; Jan Teeuwsen; Willy J M Underberg
Oxidation of recombinant methionyl human granulocyte colony stimulating factor.
Journal of pharmaceutical and biomedical analysis 1998;17(2):283-9.
1998: H A Bardelmeijer; Henk Lingeman; C de Ruiter; Willy J M Underberg
Derivatization in capillary electrophoresis.
Journal of chromatography. A 1998;807(1):3-26.
1998: GP Kaijser; J De Kraker; Auke Bult; Willy J M Underberg; Jos H Beijnen
Pharmacokinetics of ifosfamide and some metabolites in children.
Anticancer research 1998;18(3B):1941-9.
1997: H A Bardelmeijer; Joop C M Waterval; Henk Lingeman; R van't Hof; Auke Bult; Willy J M Underberg
Pre-, on- and post-column derivatization in capillary electrophoresis.
Electrophoresis 1997;18(12-13):2214-27.
1997: W N van Dijk-Wolthuis; Mies J van Steenbergen; Willy J M Underberg; Wim E Hennink
Degradation kinetics of methacrylated dextrans in aqueous solution.
Journal of pharmaceutical sciences 1997;86(4):413-7.
1997: GP Kaijser; Jos H Beijnen; Auke Bult; HJ Keizer; Willy J M Underberg
Chromatographic analysis of the enantiomers of ifosfamide and some of its metabolites in plasma and urine.
Journal of chromatography. B, Biomedical sciences and applications 1997;690(1-2):131-8.
1997: GP Kaijser; P G Ter Riet; J de Kraker; Auke Bult; Jos H Beijnen; Willy J M Underberg
Determination of 4-hydroxyifosfamide in biological matrices by high-performance liquid chromatography.
Journal of pharmaceutical and biomedical analysis 1997;15(6):773-81.
1997: J D Jonkman-de Vries; B J Van den Bemt; Wim W ten Bokkel Huinink; Willy J M Underberg; J Jantina Kettenes-van den Bosch; RE Henrar; Auke Bult; Jos H Beijnen
Pharmaceutical development of a parenteral formulation of the investigational anticancer drug clanfenur.
PDA journal of pharmaceutical science and technology / PDA 1997;51(2):89-95.
1996: GP Kaijser; Jos H Beijnen; E Rozendom; Auke Bult; Willy J M Underberg
Analysis of ifosforamide mustard, the active metabolite of ifosfamide, in plasma.
Journal of chromatography. B, Biomedical applications 1996;686(2):249-55.
1996: M A Hoitink; Jos H Beijnen; Auke Bult; O A van der Houwen; J Nijholt; Willy J M Underberg
Degradation kinetics of gonadorelin in aqueous solution.
Journal of pharmaceutical sciences 1996;85(10):1053-9.
1996: GP Kaijser; H J Keizer; Jos H Beijnen; Auke Bult; Willy J M Underberg
Pharmacokinetics of ifosfamide, 2- and 3-dechloroethylifosfamide in plasma and urine of cancer patients treated with a 10-day continuous infusion of ifosfamide.
Anticancer research 1996;16(5B):3247-57.
1995: JL Reubsaet; Jos H Beijnen; Auke Bult; E Hop; R Vermaas; Y Kellekule; J Jantina Kettenes-van den Bosch; Willy J M Underberg
Structural identification of the degradation products of the antitumor peptide antagonist [Arg6,D-Trp7,9,MePhe8]substance P (6-11).
Analytical chemistry 1995;67(23):4431-6.
1995: JL Reubsaet; Jos H Beijnen; Auke Bult; O A van der Houwen; Jan Teeuwsen; E H Koster; Willy J M Underberg
Degradation kinetics of antagonist [Arg6, D-Trp7,9, MePhe8]-substance P [6-11] in aqueous solutions.
Analytical biochemistry 1995;227(2):334-41.
1994: JL Reubsaet; Jos H Beijnen; Auke Bult; Jan Teeuwsen; E H Koster; Joop C M Waterval; Willy J M Underberg
Reversed-phase high-performance liquid chromatography and capillary electrophoresis in the stability study of the neuropeptide growth factor antagonist [Arg6,D-Trp7,9,MePhe8]-substance P (6-11): a comparative study.
Analytical biochemistry 1994;220(1):98-102.
1994: David Burger; Pieter L Meenhorst; Willy J M Underberg; J F van der Heijde; Cornelis H W Koks; J H Beijnen
Short-term, combined use of paracetamol and zidovudine does not alter the pharmacokinetics of either drug.
The Netherlands journal of medicine 1994;44(5):161-5.
1994: GP Kaijser; Jos H Beijnen; Auke Bult; Willy J M Underberg
Ifosfamide metabolism and pharmacokinetics (review).
Anticancer research 1994;14(2A):517-31.
1993: A R Wafelman; Y L Nortier; Hilde Rosing; Willy J M Underberg; R A Maes; Jos H Beijnen
High-performance liquid chromatographic determination of m-iodobenzylguanidine in urine of cancer patients.
Journal of chromatography 1993;622(1):71-7.
1993: P D Knoester; Willy J M Underberg; Jos H Beijnen
Clinical pharmacokinetics and pharmacodynamics of anticancer agents in pediatric patients (review).
Anticancer research 1993;13(5C):1795-808.
1993: GP Kaijser; A Korst; Jos H Beijnen; Auke Bult; Willy J M Underberg
The analysis of ifosfamide and its metabolites (review).
Anticancer research 1993;13(5A):1311-24.
1993: O Bekers; Jos H Beijnen; M J Tank; David Burger; Pieter L Meenhorst; A J Lombarts; Willy J M Underberg
2',3'-dideoxyinosine (ddI): its chemical stability and cyclodextrin complexation in aqueous media.
Journal of pharmaceutical and biomedical analysis 1993;11(6):489-93.
1993: M Grit; NJ Zuidam; Willy J M Underberg; Daan J A Crommelin
Hydrolysis of partially saturated egg phosphatidylcholine in aqueous liposome dispersions and the effect of cholesterol incorporation on hydrolysis kinetics.
The Journal of pharmacy and pharmacology 1993;45(6):490-5.
1993: GP Kaijser; Jos H Beijnen; E L Jeunink; Auke Bult; H J Keizer; J de Kraker; Willy J M Underberg
Determination of chloroacetaldehyde, a metabolite of oxazaphosphorine cytostatic drugs, in plasma.
Journal of chromatography 1993;614(2):253-9.
1993: M Grit; Willy J M Underberg; Daan J A Crommelin
Hydrolysis of saturated soybean phosphatidylcholine in aqueous liposome dispersions.
Journal of pharmaceutical sciences 1993;82(4):362-6.
1992: GP Kaijser; Jos H Beijnen; Auke Bult; G Wiese; J de Kraker; H J Keizer; Willy J M Underberg
Gas chromatographic determination of 2- and 3-dechloroethylifosfamide in plasma and urine.
Journal of chromatography 1992;583(2):175-82.
1992: Jos H Beijnen; R van Gijn; E E Challa; GP Kaijser; Willy J M Underberg
Chemical stability of two sterile, parenteral formulations of cyclophosphamide (Endoxan) after reconstitution and dilution in commonly used infusion fluids.
Journal of parenteral science and technology : a publication of the Parenteral Drug Association 1992;46(4):111-6.
1992: T J Hodes; Willy J M Underberg; Gerrit Los; Jos H Beijnen
Platinum antitumour agents: a review of (bio)analysis.
Pharmaceutisch weekblad. Scientific edition 1992;14(3):61-77.
1991: GP Kaijser; Jos H Beijnen; Auke Bult; G Wiese; J de Kraker; Willy J M Underberg
Gas chromatographic determination of ifosfamide in microvolumes of urine and plasma.
Journal of chromatography 1991;571(1-2):121-31.
1991: Jos H Beijnen; A U Beijnen-Bandhoe; A C Dubbelman; R van Gijn; Willy J M Underberg
Chemical and physical stability of etoposide and teniposide in commonly used infusion fluids.
Journal of parenteral science and technology : a publication of the Parenteral Drug Association 1991;45(2):108-12.
1991: Jos H Beijnen; Pieter L Meenhorst; R van Gijn; M Fromme; Hilde Rosing; Willy J M Underberg
HPLC determination of doxorubicin, doxorubicinol and four aglycone metabolites in plasma of AIDS patients.
Journal of pharmaceutical and biomedical analysis 1991;9(10-12):995-1002.
1991: Jos H Beijnen; Pieter L Meenhorst; R van Gijn; W A Hazelager; Cornelis H W Koks; Willy J M Underberg
Gas chromatographic analysis, with electron capture detection, of the antifungal drug fluconazole in microvolumes of human plasma.
Journal of pharmaceutical and biomedical analysis 1991;9(10-12):1173-5.
1991: GP Kaijser; Jos H Beijnen; Auke Bult; M H Hogeboom; Willy J M Underberg
A systematic study on the chemical stability of ifosfamide.
Journal of pharmaceutical and biomedical analysis 1991;9(10-12):1061-7.
1991: O Bekers; Jos H Beijnen; M J Tank; Auke Bult; Willy J M Underberg
Effect of cyclodextrins on the chemical stability of mitomycins in alkaline solution.
Journal of pharmaceutical and biomedical analysis 1991;9(10-12):1055-60.
1990: GP Kaijser; Willy J M Underberg; Jos H Beijnen
The risks of handling cytotoxic drugs. II. Recommendations for working with cytotoxic drugs.
Pharmaceutisch weekblad. Scientific edition 1990;12(6):228-35.
1990: GP Kaijser; Willy J M Underberg; Jos H Beijnen
The risks of handling cytotoxic drugs. I. Methods of testing exposure.
Pharmaceutisch weekblad. Scientific edition 1990;12(6):217-27.
1990: Jos H Beijnen; R van Gijn; S Horenblas; Willy J M Underberg
Chemical stability of suramin in commonly used infusion fluids.
DICP : the annals of pharmacotherapy 1990;24(11):1056-8.
1990: Jos H Beijnen; R van Gijn; Willy J M Underberg
Chemical stability of the antitumor drug mitomycin C in solutions for intravesical instillation.
Journal of parenteral science and technology : a publication of the Parenteral Drug Association 1990;44(6):332-5.
1990: Jos H Beijnen; R van Gijn; Willy J M Underberg
Gas chromatographic analysis, with nitrogen detection, of tocainide in plasma.
Journal of pharmaceutical and biomedical analysis 1990;8(8-12):1101-3.
1990: Jos H Beijnen; B R Smith; W J Keijer; R van Gijn; Wim W ten Bokkel Huinink; L T Vlasveld; Sjoerd Rodenhuis; Willy J M Underberg
High-performance liquid chromatographic analysis of the new antitumour drug SK&F 104864-A (NSC 609699) in plasma.
Journal of pharmaceutical and biomedical analysis 1990;8(8-12):789-94.
1990: Willy J M Underberg; R M Goossen; B R Smith; Jos H Beijnen
Equilibrium kinetics of the new experimental anti-tumour compound SK&F 104864-A in aqueous solution.
Journal of pharmaceutical and biomedical analysis 1990;8(8-12):681-3.
1990: O Bekers; Jos H Beijnen; M Otagiri; Auke Bult; Willy J M Underberg
Inclusion complexation of doxorubicin and daunorubicin with cyclodextrins.
Journal of pharmaceutical and biomedical analysis 1990;8(8-12):671-4.
1989: Willy J M Underberg; Gerard A Hofman; S C Lubbers; O Bekers; W W Ten Bokkel Huinink; Jos H Beijnen
Bio-analysis and preliminary pharmacokinetics of the experimental antitumour drug LL-D49194 alpha 1.
Journal of pharmaceutical and biomedical analysis 1989;7(12):1791-7.
1988: O Bekers; Jos H Beijnen; E H Groot Bramel; M Otagiri; Willy J M Underberg
Effect of cyclodextrins on anthracycline stability in acidic aqueous media.
Pharmaceutisch weekblad. Scientific edition 1988;10(5):207-12.
1988: J M van der Nat; Jos H Beijnen; R J Driebergen; L A Thart; H van Dijk; Willy J M Underberg; R P Labadie
In vitro immunosuppressive activities of recently developed anthracycline cytostatics.
Anticancer research 1988;8(3):489-93.
1987: Willy J M Underberg; Jos H Beijnen
Re-use of mitomycin C in the treatment of superficial tumours of the urinary bladder: an evaluation in view of its chemical stability.
Anticancer research 1987;7(4B):707-10.
1986: Jos H Beijnen; O A van der Houwen; H Rosing; Willy J M Underberg
A systematic study on the chemical stability of mitomycin A and mitomycin B.
Chemical & pharmaceutical bulletin 1986;34(7):2900-13.
1986: H Lingeman; H A van Munster; J H Beynen; Willy J M Underberg; A Hulshoff
High-performance liquid chromatographic analysis of basic compounds on non-modified silica gel and aluminium oxide with aqueous solvent mixtures.
Journal of chromatography 1986;352():261-74.
1986: Jos H Beijnen; J M Van der Nat; R P Labadie; Willy J M Underberg
Decomposition of mitomycin and anthracycline cytostatics in cell culture media.
Anticancer research 1986;6(1):39-43.
1985: J H Beijnen; H Rosing; P A de Vries; Willy J M Underberg
Stability of anthracycline antitumour agents in infusion fluids.
Journal of parenteral science and technology : a publication of the Parenteral Drug Association 1985;39(6):220-2.
1985: Jos H Beijnen; G Wiese; Willy J M Underberg
Aspects of the chemical stability of doxorubicin and seven other anthracyclines in acidic solution.
Pharmaceutisch weekblad. Scientific edition 1985;7(3):109-16.
1983: Willy J M Underberg; H Lingeman
Aspects of the chemical stability of mitomycin and porfiromycin in acidic solution.
Journal of pharmaceutical sciences 1983;72(5):549-53.
1983: Willy J M Underberg; H Lingeman
Determination of pKa values of some prototropic functions in mitomycin and porfiromycin.
Journal of pharmaceutical sciences 1983;72(5):553-6.