Lopes, P. R.; Furtado, P. V.; Oliveira, C. A. de. Efficiency of Salivary Progesterone Measurement to Identify the Ovulation in Bitches. Braz. J. Vet. Res. Anim. Sci. 2012, 49 (4), 269-276. https://doi.org/10.11606/issn.1678-4456.v49i4p269-276.