1. Electrical potentials of the human brain;Loomis,1936
2. Regularly occurring periods of eye motility, and concomitant phenomena, during sleep;Aserinsky,1953
3. 3. RechtschaffenA, KalesA, eds. A Manual of Standardized Terminology: Techniques and Scoring System for Sleep Stages of Human Subjects. Washington, DC: Public Health Service, U.S. Government Printing Office; 1968.
4. Nocturnal activity patterns of feral ponies;Keiper,1980
5. The behavior and social organization of the New Forest ponies;Tyler,1972