Mattos, I., J. R. Miras Mermudes, and P. Reyes-Castillo. “Larval Structure of Passalus Gravelyi and Sexual Dimorphism in Passalid Larvae”. Revista De Biología Tropical, vol. 63, no. 3, Sept. 2015, pp. 695–704, doi:10.15517/rbt.v63i3.15582.