Sonner, J.B., Miglino, M.A., Santos, T.C. dos, Carvalhal, R., Assis Neto, A.C. de, Moura, C.E.B. de and Oliveira, M.F. de 2004. Macroscopic and morphometric features of testicles in collared peccary and white-lipped peccary. Biota Neotropica. 4, 2 (Jan. 2004).