Spiridonov, I.G., E.N. Levchenko, and D.S. Klyucharev. “Methodological Approach to Determination of Priorities in Ecological Estimation of the Russian Territories”. KnE Materials Science 6, no. 1 (December 31, 2020): 37–41. Accessed June 16, 2021. https://knepublishing.com/index.php/KnE-Materials/article/view/8040.