KENZHIN, Z. D.; KERIMKULOVA, A. B.; BIGALIEV, A. B. The principles of methods in determining level of bioindication of damaged ecosystems. International Journal of Biology and Chemistry, [S. l.], n. 3, p. 43–47, 2012. Disponível em: https://ijbch.kaznu.kz/index.php/kaznu/article/view/51. Acesso em: 29 nov. 2021.