Kraynukova, A. N, E. O. Chistyakova, and A. N. Krainiukov. “Complex Assessment of Water Body Environmental State (exemplified by Seversky Donets River Basin)”. Visnyk of V. N. Karazin Kharkiv National University series «Еcоlogy»0, no. 944 (March 31, 2014): 61-71. Accessed March 3, 2024. https://periodicals.karazin.ua/ecology/article/view/756.