Coppo, J. A., N. B. Mussart, and S. A. Fioranelli. “Physiological Variation of Enzymatic Activities in Blood of Bullfrog, Rana Catesbeiana (Shaw, 1802)”. Revista Veterinaria, vol. 12, no. 1 y 2, Oct. 2016, pp. 22-27, doi:10.30972/vet.121 y 2674.