Gwiazda, R., Bukacinski, D., Neubauer, G., Faber, M., Betleja, J., Zagalska-Neubauer, M., Bukacinska, M., & Chylarecki, P. (2011). Diet composition of the Caspian Gull (Larus cachinanns) in inland Poland: effects of breeding area, breeding stage and sympatric breeding with the Herring Gull (Larus argentatus) . Ornis Fennica, 88(2), 80–89. https://doi.org/10.51812/of.133765