BioStor
 | On the Carpus and Tarsus of the Anura G B Howes (1888) Proceedings of The Zoological Society of London 1888: 141-182 |
 | XXIII.—Remarks on the structure of the hand in Pipa and Xenopus Hector F E Jungersen (1891) Annals And Magazine of Natural History 8: 193-206 |
 | A list of the batrachians and reptiles of the Gaboon (French Congo), with descriptions of new genera and species G A Boulenger (1900) Proc. Zool. Soc. London 1900: 433-456 |
 | W. T. BLANFORD, Esq., LL.D., F.E.S., Vice-President, in the Chair (1900) Proceedings of The Zoological Society of London 1900: 429-516 |
 | Batraciens de la Guinée Espagnole G A Boulenger (1903) Memorias de la Real Sociedad Española de Historia Natural 1: 61-64 |
 | Die Amphibienfauna von Kamerun. Mit einer Bestimmungstabelle Fritz Nieden (1908) Mitteilungen Aus Dem Zoologischen Museum In Berlin 3: 489-518 |
 | Neue Reptilien und Amphibien aus Kamerun F Nieden (1910) Archiv für Naturgeschichte. Berlin 76: 234-246 |
 | Batraciens et reptiles recueillis par le Dr. C. Christy au Congo Belge dans les Districts de Stanleyville, Haut-Uelé et Ituri en 1912-1914 G A Boulenger (1919) Revue Zoologique Africaine. Bruxelles 7: 1-29 |
 | The opalinid ciliate infusorians Maynard M Metcalf (1923) Bulletin of the United States National Museum 120: 1-484 |
 | Further studies on the Opalinid ciliate infusorians and their hosts (1940) Proceedings of The United States National Museum 87: 465-634 |