Caspers, H. (1962). "Corliss, John O.: The Ciliated Protozoa: Characterization, Classification, and Guide to the Literature. With 22pl. Oxford–London–New York–Paris: Pergamon Press Ltd. 1961.310p. Intern. Series of Monographs on Pure and Applied Biology, Div. Zoology, Vol. 7. 80 – s". Internationale Revue der gesamten Hydrobiologie und Hydrographie. 47 (3): 172. doi:10.1002/iroh.19620470319. ISSN1522-2632.
Caspers, H. (1962). "Corliss, John O.: The Ciliated Protozoa: Characterization, Classification, and Guide to the Literature. With 22pl. Oxford–London–New York–Paris: Pergamon Press Ltd. 1961.310p. Intern. Series of Monographs on Pure and Applied Biology, Div. Zoology, Vol. 7. 80 – s". Internationale Revue der gesamten Hydrobiologie und Hydrographie. 47 (3): 172. doi:10.1002/iroh.19620470319. ISSN1522-2632.