“Spatial and Temporal Analysis of Nitrate Content in the Groundwater of the Zadonsk-Optukhovian Aquifer Carbonate Complex of the Right Bank of the Lipetsk Industrial District Between 2001 and 2019”. 2022. Proceedings of Voronezh State University. Series: Geology, no. 4 (December): 94-107. https://doi.org/10.17308/geology/1609-0691/2022/4/94-107.