Vargas V., Mario. 1969. “A Contribution to the Morphology of the Eggs and Nymphal Stages of <i>Porocephalus stilesi</i> Sambon, 1910 and <i>Porocephalus clavatus</i≫ (Wyman, 1847) Sambon, 1910 (Pentastomida)”. Revista De Biología Tropical 17 (1):27–89. https://doi.org/10.15517/rev.biol.trop. v17i1.28239.