Santana, Clarissa Helena, and Renato Lima Santos. “Canine Pyometra – an Update and Revision of Diagnostic Terminology”. Brazilian Journal of Veterinary Pathology, vol. 14, no. 1, Mar. 2021, pp. 1-8, https://doi.org/10.24070/bjvp.1983-0246.v14i1p1-8.