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Information provided by the North American Bear Center



Folk, G. E., M. A. Folk, and J. G. Minor. 1972. Physiological condition of three species of bears in winter dens. Ursus 2: 107-125.

Folk, G. E., A. Larson, and M. A. Folk. 1976. Physiology of hibernating bears. Ursus 3:373-380.

Guyton, A. C. 1981. Textbook of medical physiology. Sixth ed. W. B. Saunders Co., Philadelphia, Pennsylvania, 1,074 pp.

Nelson, R. Al, G. Edgar Folk, Jr, E. W. Pfeiffer, John J. Craighead, C. J. Jonkel, and D. L. Steiger. 1983. Behavior, biochemistry, and hibernation in black, grizzly, and polar bears. Ursus 5:284-290.

Rogers, L. L., and S. C. Durst. 1987. Evidence that black bears reduce peripheral blood flow during hibernation. J. Mammal. 68(4):872-875.

Watts, P. D. et al. 1981. Mammalian hibernation and the oxygen consumption of a denning black bear. Comparative Biochemistry and Physiology A. Comparative Physiology 69:121-123.

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