Shirkov, B., Perestyuk, O., & Kushnir, A. (2015). Geoelectric studies of the Belgorod-Sumy megablock of the northern slope of the Dnieper-Donets Trough. Geofizicheskiy Zhurnal, 37(5), 176–182. https://doi.org/10.24028/gzh.0203-3100.v37i5.2015.111163