(en) Maynard M. Metcalf, « The opalinid ciliate infusorians », Bulletin of the United States National Museum, vol. 120, , p. 1-484 (lire en ligne)
doi.org
dx.doi.org
(en) D. Selechnik, L.A. Rollins, G.P. Brown, C. Kelehear et R. Shine, « The things they carried: The pathogenic effects of old and new parasites following the intercontinental invasion of the Australian cane toad (Rhinella marina) », International Journal for Parasitology: Parasites and Wildlife, (DOI10.1016/j.ijppaw.2016.12.001)