Junqueiral, L. C., and P. Joazeiro. “tructural and istochemical bservations on the epatic ystem í iphonops nnulatus Amphibia ymnophiona)”. cta icroscopica, ol. 8, no. 2, Dec. 1999, pp. 43-48, https://acta-microscopica.org/acta/article/view/179.