Moulting feathers and egg shell of waterfowl as а noninvasive bioindicators of the ecological status of aquatic ecosystems. Eurasian Journal of Ecology, [S. l.], v. 37, n. 1, 2016. Disponível em: https://bulletin-ecology.kaznu.kz/index.php/1-eco/article/view/71. Acesso em: 13 jul. 2026.