Effectiveness of environmental enrichment techniques on the reduction of deviant behavior of captive black tufted-ear marmosets (Callithrix penicillata) - Sgai, Manuela Gonçalves Fraga Geronymo; Rocha, C. G; Portella, T. P; Cottini, A; Pizzutto, Cristiane Schilbach; Nichi, Marcilio; Guimarães, Marcelo Alcindo de Barros Vaz (International Conference on Environmental Enrichment, 2007)