1. Rechtschaffen, A., Current perspectives on the function of sleep, Perspect. Biol. Med., 1998, vol. 41, no. 2, pp. 359–390.
2. Kleitman, N., Sleep and wakefulness (2nd Edition), Chicago, 1963, p. 94.
3. Pastukhov, Yu.F., Neurochemical and molecular mechanisms of sleep, Proc. of the 3th Intern. Workshop “Sleep: a window to the world of wakefulness”, Rostov-na-Donu, Russia, 2005, p. 75.
4. Pastukhov, Yu.F., Paradixical sleep and brain temperature: interrelationship during euthermic (“normothermic”) and hypometabolic seasons in hibernation ground squirrels Citellus major, Zh. Evol. Fiziol. Biokh., 1999, vol. 35, no. 3, pp. 237–243.
5. Pastukhov, Yu.F., Maksimov, A.L., and Khaskin, V.V., Adaptatsiya k kholodu i usloviyam Subarktiki: problem termofiziologii (Adaptation to Cold and Subarctic Conditions: Problems of Thermophysiology), Magadan, 2003, vol. 1, p. 373.