Elton, M. R., & Hofman, W. F. (1998). MMN and N330 in younger and older subjects in wake and light sleep. International Journal of Psychophysiology, 30(A), 259-260.
Hofman, W. F., & Steenhof, L. (1997). Sleep characteristics of Dutch adolescents and the relation with school performance. In D. Beersma (Ed.), Sleep-wake research in the Netherlands, vol. 8 (pp. 51-55). Dutch Society for Sleep-Wake Research.
Kramer, C. J., Kerkhof, G. A., & Hofman, W. F. (1997). Variabilite, rythme circadien et comportement someil-eveil chez la personne agee saine. In Troisiemes journees internationales des troubles du sommeil (pp. 121)
Kramer, C. J., Hofman, W. F., & Kerkhof, G. A. (1997). Age-effects in the spectral analysis of the MSLT. In D. G. M. Beersma (Ed.), Sleep-Wake research in the Netherlands, Vol 8 (pp. 75-78). Elinkwijk.
Kramer, C. J., Kerkhof, G. A., & Hofman, W. F. (1997). Sleep-wake behaviour and circadian rhythmicity in aging. Journal of Sleep Research, 26, 725.
Kramer, C. J., Kerkhof, G. A., & Hofman, W. F. (1997). Transitions from wakefulness to sleep at different times of day: ols vs. young subjects. Biological Rhythm Research.
Elton, M. R., Hofman, W. F., & Westenberg, F. (1997). Mismatch negativity and N330 in the elderly. In D. G. M. Beersma (Ed.), Sleep Wake Research in The Netherlands, vol. 8 (pp. 43-46). De Tijdstroom.
Hofman, W. F., Lijzenga, C., Snel, J., Kok, A., & Mirmiran, M. (1997). Aerobic fitness and the circadian arousal rhythm in the elderly. Journal of Sleep Research, 26, 717-717.
Kluft, C., Elton, M. R., Hofman, W. F., & Kenemans, J. L. (1997). Event-related potentials to deviant tones in light sleep in elderly males. Journal of Psychophysiology, 11(95A).
Lijzenga, C., Hofman, W. F., Snel, J., Kok, A., & Mirmiran, M. (1997). Effect of aerobic fitness on the sleep-EEG spectrum in elderly subjects. Journal of Sleep Research, 26, 734-734.