“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, (4), pp. 94–107. doi:10.17308/geology/1609-0691/2022/4/94-107.