Key term: subjective sleepiness

Original article 2007;33(1):51-57   pdf
Simulator driving performance, subjective sleepiness and salivary cortisol in a fast-forward versus a slow-backward rotating shift system
De Valck E, Quanten S, Berckmans D, Cluydts R
 
Original article 1996;22(2):133-138   pdf
Circadian adjustment of men and women to night work
Hakola T, Härmä MI, Laitinen JT