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. geology [Internet]. 2022 Dec. 26 [cited 2026 Apr. 4];(4):94-107. Available from: https://journals.vsu.ru/geology/article/view/10704