Hut, RA; Barnes, BM; Daan, S (Jan 2002). «Body temperature patterns before, during, and after semi-natural hibernation in the European ground squirrel.». Journal of Comparative Physiology B172 (1): 47-58. PMID11824403. doi:10.1007/s003600100226.
Tøien, Ø; Blake, J; Edgar, DM; Grahn, DA; Heller, HC; Barnes, BM (18 de febrero de 2011). «Hibernation in black bears: independence of metabolic suppression from body temperature». Science331 (6019): 906-9. Bibcode:2011Sci...331..906T. PMID21330544. doi:10.1126/science.1199435.
Tøien, Ø; Blake, J; Edgar, DM; Grahn, DA; Heller, HC; Barnes, BM (18 de febrero de 2011). «Hibernation in black bears: independence of metabolic suppression from body temperature». Science331 (6019): 906-9. Bibcode:2011Sci...331..906T. PMID21330544. doi:10.1126/science.1199435.
Hut, RA; Barnes, BM; Daan, S (Jan 2002). «Body temperature patterns before, during, and after semi-natural hibernation in the European ground squirrel.». Journal of Comparative Physiology B172 (1): 47-58. PMID11824403. doi:10.1007/s003600100226.
Tøien, Ø; Blake, J; Edgar, DM; Grahn, DA; Heller, HC; Barnes, BM (18 de febrero de 2011). «Hibernation in black bears: independence of metabolic suppression from body temperature». Science331 (6019): 906-9. Bibcode:2011Sci...331..906T. PMID21330544. doi:10.1126/science.1199435.