Brito, Maíra Morales, et al. “Sperm-Binding to the Perivitelline Membrane of Chicken Egg Yolk As a Functional Test for Sperm Evaluation in Dogs”. Brazilian Journal of Veterinary Research and Animal Science, vol. 54, no. 4, Dec. 2017, pp. 366-74, https://doi.org/10.11606/issn.1678-4456.bjvras.2017.127331.