Fusco & Palmieri 1980. Heliconema serpens sp. n. (Nematoda: Physalopteridae) and Camallanides malayensis sp. n. (Nematoda: Camallanidae) from Cerberus rhynchops (Schneider) (Reptilia: Colubridae) in Malaysia. Proceedings of the Helminthological Society of Washington, 47(1) 1980: 72-79