Pizzutto, C. S., Sgai, M. G. F. G., Viau, P., Chelini, M. O. M., Oliveira, C. A. de and Guimarães, M. A. de B. V. (2008) “Laboratorial and physiological validation of comercial kits for quantification of fecal corticoids of captive chimpanzees (Pan troglodytes) and orangutangs (Pongo pygmaeus) under environmental enriched conditions”, Brazilian Journal of Veterinary Research and Animal Science, 45(supl.), pp. 104-110. doi: 10.11606/S1413-95962008000700015.