Kouzov, Sergey. “On the Occurrence Status of the Great Egret (<em>Casmerodius albus< Em> L.) on the Kurgalsky Peninsula and Adjacent Areas of the Eastern Part of Gulf of Finland in the Last Decade”. Biological Communications, no. 1, Mar. 2015, pp. 41–50, https://biocomm.spbu.ru/article/view/882.