Kalenski, Tabatha do Amaral, et al. “Identification of the Microorganisms Involved in Severe Sepsis Caused by Pyometra in Bitches Undergoing Ovariohysterectomy”. Brazilian Journal of Veterinary Research and Animal Science, vol. 49, no. 2, Apr. 2012, pp. 130-8, https://doi.org/10.11606/issn.2318-3659.v49i2p130-138.