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Sunquist, M. E.; Montgomery, G. G. (1973). "Activity Patterns and Rates of Movement of Two-Toed and Three-Toed Sloths (Choloepus hoffmanni and Bradypus infuscatus)". Journal of Mammalogy. 54 (4): 946–954. doi:10.2307/1379088. JSTOR1379088. PMID4761371.
Mendel, Frank C.; Piggins, David; Fish, Dale R. (1985). "Vision of Two-Toed Sloths (Choloepus)". Journal of Mammalogy. 66 (1): 197–200. doi:10.2307/1380987. ISSN0022-2372. JSTOR1380987.
Mendel, Frank C. (1981). "Use of Hands and Feet of Two-Toed Sloths (Choloepus hoffmanni) during Climbing and Terrestrial Locomotion". Journal of Mammalogy. 62 (2): 413–421. doi:10.2307/1380728. JSTOR1380728.
Bailey, T. N. (1974). "Social organization in a bobcat population". The Journal of Wildlife Management. 38 (3): 435–446. doi:10.2307/3800874. JSTOR3800874.
Sunquist, M. E.; Montgomery, G. G. (1973). "Activity Patterns and Rates of Movement of Two-Toed and Three-Toed Sloths (Choloepus hoffmanni and Bradypus infuscatus)". Journal of Mammalogy. 54 (4): 946–954. doi:10.2307/1379088. JSTOR1379088. PMID4761371.
Hill, N.; Tenney, S. M. (1974-12-01). "Ventilatory responses to CO2, and hypoxia in the two-toed sloth Choloepus Hoffmanni". Respiration Physiology. 22 (3): 311–323. doi:10.1016/0034-5687(74)90080-2. ISSN0034-5687. PMID4475470.
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Hill, N.; Tenney, S. M. (1974-12-01). "Ventilatory responses to CO2, and hypoxia in the two-toed sloth Choloepus Hoffmanni". Respiration Physiology. 22 (3): 311–323. doi:10.1016/0034-5687(74)90080-2. ISSN0034-5687. PMID4475470.
Mendel, Frank C.; Piggins, David; Fish, Dale R. (1985). "Vision of Two-Toed Sloths (Choloepus)". Journal of Mammalogy. 66 (1): 197–200. doi:10.2307/1380987. ISSN0022-2372. JSTOR1380987.