Lubkov Michail Improvement of well drainage radius calculation / Michail Lubkov, Oksana Zakharchuk // ACADEMIC JOURNAL Industrial Machine Building, Civil Engineering. – Poltava: PNTU, 2022. – VOL. 1 (58). – PP. 135-140. – doi:https://doi.org/10.26906/znp.2022.58.3089.