1. Monographie der Familie Ophryoscolecidae;Dogiel;Arch. Protistenkd.,1927
2. Intestinal protozoa of the African elephant Loxodonta africana (Blumenbach);Eloff;S. Afr. J. Zool.,1980
3. La infraciliación en Cycloposthium edentatum Strelkow;Fernández-Galiano;Bol. Real. Soc. Esp. Hist. Nat. Biol.,1959
4. General morphology and stomatogenesis of two species of the genus Entodinium (Ciliophora, Entodiniomorphida);Fernández-Galiano;Acta Protozool.,1985
5. Classe Vestibuliferea de Puytrac et al., 1974;Grain,1994