@inproceedings{inproceedings6254d80c,
title   = {The use of operant conditioning with positive reinforcement in order to collect urinary samples of black tufted-ear marmosets (Callithrix penicillata) kept under stable social conditions},
author = {Sgai, Manuela Gonçalves Fraga Geronymo and Zeildler, E. V and Rocha, C. G and Portella, T. P and Cottini, Ana Paola and Pizzutto, Cristiane Schilbach and Nichi, Marcilio and Guimarães, Marcelo Alcindo de Barros Vaz},
year = {2007},
booktitle   = {International Conference on Environmental Enrichment}
}