R.N, Ushakov, Ruchkina A.V, Levin V.I, Zakharova O.A, Kostin Ya.V., and Golovina N.A. 2018. “Sustainability of Agro-Gray Soil to Pollution and Acidification, and Its Biodiagnostics”. International Journal of Engineering & Technology 7 (4.36): 929-34. https://doi.org/10.14419/ijet.v7i4.36.24923.