N. López-Zhindón, M. Dumas, X. Samaniego, D. Galarza, and D. Argudo-Garzón, “Evaluation of two extenders in Canine epididymal spermatozoa freezing (Polyvinyl alcohol and egg yolk)”, Rev. Cient. FCV-LUZ, vol. 32, pp. 1-5, Sep. 2022.