@article{article68cc1ec7,
title   = {Tracking the ovarian cycle in black-and-gold howlers (Alouatta caraya) by measuring fecal steroids and observing vaginal bleeding},
author = {Kugelmeier, Tatiana and Valle, Rodrigo del Rio do and Guimaraes, Marcelo Alcindo de Barros Vaz and Muniz, José Augusto Pereira Carneiro and Monteiro, Frederico Ozanan Barros and Oliveira, Cláudio Alvarenga de},
year = {2011},
doi = {10.1007/s10764-010-9490-7},
journal   = {International Journal of Primatology}
}