Identification of stereotypies in chimpanzees (Pan troglodytes) held in captivity - Pizzutto, Cristiane Schilbach; Guimarães, Marcelo Alcindo de Barros Vaz; Ades, César; Corrêa S. H. R; Beresca, Ana Maria; Barnabé, Renato Campanarut (International Conference on Environmental Enrichment, 2003)