Ramirez, O., C. Vaughan, G. Herrera, y R. Guries. «Temporal and Spatial Resource Use by Female Three-Toed Sloths and Their Young in an Agricultural Landscape in Costa Rica». Revista De Biología Tropical, vol. 59, n.º 4, diciembre de 2011, pp. 1743–1755, doi:10.15517/rbt.v59i4.33181.