Psychologische aspecten van complexiteit / C. SteffenRapid eye movement sleep and dreaming : studies of age and activation / Dolf WatermanProvoking penile responses : activation and inhibition of male genital response / Henricus Antonius Theodorus Maria JanssenCentral activation of the sexual system / Mark SpieringChronic insomnia: performance & arousal / Michael VarkevisserChronic insomnia: performance & arousal / Michael VarkevisserCentral activation of the sexual system / Mark SpieringArousal en motivatie bij vigilantietaken / door Pieter Cornelis Wilhelmus van WieringenStress, activatie en verrichtingen / door A.F. Sanders