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2. The comparative anatomy of the nervous system of vertebrate, including man;Ariëns-Kappers,1936
3. Sommeil chez le rat-kangourou, Potorous apicalis Etude chez l'adulte et le jeune un mois avant la sortie definitive du marsupium;Astic,1974
4. Sleep in the burrowing owl (Speotyto cunicularia hypugaea);Berger;Behavioral Biology,1972
5. Polygraphic and behavioral study of sleep in geese: Existence of nuchal atonia during paradoxical sleep;Dewesmes;Physiology and Behavior,1985