Bakos, G., Sahu, K. C., Menzies, J., Vreeswijk, P. M., & Frontera, F. (1999). GRB 990712. IAU Circular, 7225, 3.
Zuiderwijk, A. C. M. (1999). Resultaten monitoring over 1998. Ravon werkgroep Monitoring.
Scholten, O., Ruigrok, N., & Heerma, P. (1999). Aanpak media wakkert cynisme media aan. Trouw.
Zuiderwijk, A. C. M. (1999). Themanummer: reptielen en terreinbeheer. Ravon werkgroep Monitoring.
Jans, J. H. (1999). The Status of the Self-sufficiency and Proximity Principles with regard to the Disposal and Recovery of Waste in the European Community. Journal of environmental law, 1, 121-156.
Klis, F. M., de Groot, P. W. J., Andel, A., & Brekelmans, S. S. C. (1999). Genes involved in cell wall construction. Identification of genes involved in maturation and assembly of cell wall components. In Eurofan '99; The fourth meeting (pp. 35-35).
van der Heijden, P. F. (Ed.) (1999). Arbeidsovereenkomst (losbladig). Kluwer.
van der Heijden, P. F. (Ed.) (1999). Ondernemingsraad (losbladig). Kluwer.
Klis, F. M., & Kapteijn, J. C. (1999). Dynamics of the molecular architecture of the cell wall of Saccharomyces cerevisiae. In 20th Int. Specialized symposium on Yeasts; Yeast cell surfaces and membrane phenomena (pp. 18-19).
Hamelink, C. J. (1999). Digitaal fatsoen: Mensenrechten in cyberspace. Boom.