Aires, Eduardo Duarte, Maíra Aparecida Stefanini, and Antonio Marcos Orsi. 2000. “Ultrastructural Features and Differentiation of the Spermatids in Brycon Orbignyanus During the Spermiogenesis”. Brazilian Journal of Veterinary Research and Animal Science 37 (3):183-88. https://doi.org/10.1590/S1413-95962000000300002.