Bukackiński, Dariusz, Monika Bukacińska, and Milena Grabowska. 2018. “Does the Vicinity of the Black-Headed Gull Colony (Chroicocephalus Ridibundus) Increase the Breeding Success of the Common Tern (Sterna Hirundo) on the Islands of the Middle Vistula?”. Studia Ecologiae Et Bioethicae 16 (4):43-50. https://doi.org/10.21697/seb.2018.16.4.04.