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Zeef, E. J., & Kok, A. (1993). Is the search negativity related to both task demands and motivation? Journal of Psychophysiology, 7, 72.
Kenemans, J. L., Kok, A., & Smulders, F. T. (1993). Event-related potentials to conjunctions of spatial frequency and orientation as a function of stimulus parameters and response requirements. Electroencephalography and Clinical Neurophysiology. Evoked Potentials, 88(1), 51-63.
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Waterman, D., Woestenburg, J. C., Elton, M., Hofman, W., & Kok, A. (1992). Removal of ocular artifacts from the REM sleep EEG. Sleep, 15(4), 371-375.
Kok, A. (1992). Determining the locus of age-related slowing of behavior : A synthesis of recent event-related potential studies. International Journal of Psychology, 27(3-4), 207.