World Register of Marine Species (WoRMS)
MolluscaBase eds. (2026). MolluscaBase. Cyclocardia Conrad, 1867. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=156830 on 2026-08-25
Conrad, T. A. (1867). Description of a new genus of Astartidae. American Journal of Conchology. 3(2): 191.
Savitsky, V.O. (1979). Novyi rod karditid Crassicardia Savizky, gen. nov. (Bivalvia). [A new genus of carditid, Crassicardia Savitskii, gen. nov. (Bivalvia)]. pp. 65-68, in: A. G. Ablaev, Z. N. Poiarkova & B. V. Poiarkov, eds., Paleontologiia i stratigrafiia Dal'nego Vostoka. [Paleontology and stratigraphy of the Far East]. Akad. Nauk SSSR, Dal'novostochnyi Nauchnyi Tsentr, Dal'novostochnyi Geologicheskii Institut. 155 pp., 16 pls.