Datsenko, Liudmyla, and Serhii Kolomiiets. 2020. “Groundwaters of Nikolskoho Region (Donbass): Geology, Stratigraphy, Hydrogeology, Topographic and Geodesic Works”. Primedia ELaunch LLC, November, 30-46. https://doi.org/10.36074/stplsepmad.ed-1.03.