World Register of Marine Species (WoRMS)
MolluscaBase eds. (2026). MolluscaBase. Belgrandiella copiosus Angelov, 1972. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=1759582 on 2026-08-30
Angelov, A. (1972). Neue Hydrobiidae aus Höhlengewässern Bulgariens. Archiv für Molluskenkunde. 102 (1/3): 107-112.