International Commisision on Zoological Nomenclature 1922. Opinion 75. Twenty-seven generic names of Protozoa, Vermes, Pisces, Reptilia and Mammalia included in the Official List of Zoological Names. Smithsonian Miscellaneous Collections 73(1): 35–37. BHL
Reprint: International Commisision on Zoological Nomenclature. 1958. Opinion 75. Twenty-seven generic names of Protozoa, Vermes, Pisces, Reptilia and Mammalia included in the Official List of Zoological Names. Opinions and declarations rendered by the International Commission on Zoological Nomenclature 1B: 219–221. BHL.