I. Stocka, J. Dziekońska- Rynko, K. Mierzejewska, K. Stańczak, and B. Wziątek, “Occurrence of Nematodes in the alimentary tract of great cormorants [Phalacrocorax carbo (Linnaeus, 1758)] in colonies located in the upper and lower Vistula River”, OandHS, vol. 46, no. 2, pp. 168–173, Jun. 2017.