1. A two-process model of sleep regulation;Borbély;Hum. Neurobiol.,1982
2. Timing of human sleep: recovery process gated by a circadian pacemaker;Daan;Amer. J. Physiol.,1984
3. (Reg. Integ. Comp. Physiol., 15): R161–R178.
4. Changes in sleep cycle patterns with age;Feinberg;J. psychiat. Res.,1974
5. The regulation of human sleep: clues from its phenomenology;Feinberg;Hum. Neurobiol.,1982