(1)
Gwiazda, R.; Bukacinski, D.; Neubauer, G.; Faber, M.; Betleja, J.; Zagalska-Neubauer, M.; Bukacinska, M.; Chylarecki, P. 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 Fenn 2011, 88, 80–89.