Gruber, A. L., 1971, Problems of sexual dimorphism, population structure and taxonomy of the Ordovician genus Tetradella (Ostracoda): Journal of Paleontology, v. 45, p. 6-22.
Kurten, B., 1969, Sexual Dimorphism in Fossil Mammals, in Westermann, G. E. G., ed., Sexual Dimorphism in Fossil Metazoa and Taxonomic Implications: Stuttgart, E. Schweizerbart'sche Verlagbuchhandlung, p. 226-227.
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