Duong, L. T., Kraak, J. C., & Kok, W. T. (2000). Application of micellar electrokinetic chromatography for the separation of retinoids. Journal of Pharmaceutical and Biomedical Analysis, 22, 879-885.

Kok, W. T. (2000). Capillary electrophoresis: instrumentation and operation. Chromatographia, 51, S1-S89.

Seifar, R. M., Kraak, J. C., Poppe, H., & Kok, W. T. (1999). Application of capillary electrochromatography to the separation of phenylthiohydantoin-amino acids. Journal of Chromatography A, 832, 133-140. https://doi.org/10.1016/S0021-9673(98)01014-0

Stol, R., Kok, W. T., & Poppe, H. (1999). Capillary electrochromatography with macroporous particles. Journal of Chromatography A, 853, 45-54. https://doi.org/10.1016/S0021-9673(99)00384-2

Venema, E., Kraak, J. C., Poppe, H., & Tijssen, R. (1999). Pore flow effects on electrically driven size-exclusion chromatography. Journal of Chromatography A, 837, 3-15. https://doi.org/10.1016/S0021-9673(99)00076-X

Mes, E. P. C., Kok, W. T., Poppe, H., & Tijssen, R. (1999). Comparison of methods for the determination of diffusion coefficients of polymers in dilute solutions: The influence of polydispersity. Journal of Polymer Science, Part B, Polymer Physics, 37, 593-603. https://doi.org/10.1002/(SICI)1099-0488(19990315)37:6<593::AID-POLB11>3.3.CO;2-E

Mes, E. P. C., Tijssen, R., & Kok, W. T. (1999). Rapid detection of compositional drift of polydisperse copolymers using thermal field-flow fractionation and multi-angle light scattering. Chromatographia, 50, 45-51. https://doi.org/10.1007/BF02493616

Schoenmakers, P. J., Blomberg, J., & Beens, J. (1999). Advanced chromatography for oil analysis. Chemistry in Australia, 50, 45-51.

Schoenmakers, P. J., Kok, W. T., & Tijssen, R. (1999). Advances in polymer separations. Chromatography, 20, 298-303.