Paz, R. C. R. da, R. M. Züge, V. H. Barnabe, R. G. Morato, P. A. N. Felippe, and R. C. Barnabe. “Penetration Assay of Frozen Jaguar (Panthera Onca) Sperm in Heterologous Oocytes”. Brazilian Journal of Veterinary Research and Animal Science, vol. 37, no. 6, Dec. 2000, pp. 462-6, doi:10.1590/S1413-95962000000600008.