Grishkevich, G.N. (1967). Novyy vid roda
Cardium iz nizhnevolynskogo gorizonta nizhnego sarmata Volyno-Podolii [A new characteristic species from the Upper [sic] Volynian horizon of the Upper [sic] Sarmatian of Volhyno-Podolia].
Paleontologicheskiy sbornik. 4: 113-116.