O. M.  Amin, Van Ha, N., and Heckmann, R. A., ?New and already known acanthocephalans from amphibians and reptiles in Vietnam, with keys to species of Pseudoacanthocephalus Petrochenko, 1956 (Echinorhynchidae) and Sphaerechinorhynchus Johnston and Deland, 1929 (Plagiorhynchidae).?, J Parasitol, vol. 94, no. 1, pp. 181-9, 2008.

O. M.  Amin, Van Ha, N., and Heckmann, R. A., ?New and already known acanthocephalans mostly from mammals in Vietnam, with descriptions of two new genera and species in Archiacanthocephala.?, J Parasitol, vol. 94, no. 1, pp. 194-201, 2008.