APOSTOLOU, A., PEHLIVANOV, L. SCHABUSS, M., ZORNING, H. (2019)
Distribution of the Ukrainian Brook Lamprey Eudontomyzon mariae (Berg, 1931) (Cephalaspidomorphi: Petromyzontidae) in Bulgarian Protected Zones along the Danube River. Acta zool. bulg., 71 (1), 2019: 149-151.