Ecological assessment of the lake ecosystem sustainability as exemplified by Lake Gorkoye (Chelyabinsk Region)Alfira Sibirkina, Sergey Likhachev, Dmitry Dvinin, Georgiy Voitovich, Lyubov Trofimova, Lada Markova and Oksana MulyukovaE3S Web Conf., 258 (2021) 08008DOI: https://doi.org/10.1051/e3sconf/202125808008