1. Daytime sleepiness and sleep “attacks”;Dement,1976
2. The effect of L-tryptophan on the sleep-dream cycle in man;Hartmann;Psychoson. Sci.,1967
3. The Functions of Sleep;Hartmann,1973
4. Tryptophan and sleep: who responds to tryptophan?;Hartmann,1981
5. L-tryptophan and sleep;Hartmann;Psychopharmacologia,1971