Gupta, Ramesh. 1964. “Four New Species of the Genus Holostephanus Szidat, 1936 from Indian Birds, With a Brief Review of the Genus (Trematoda: Cyathocotylidae)”. Revista De Biología Tropical 12 (1):81–95. https://doi.org/10.15517/rev.biol.trop.1964.31345.