TY JOUR TI Simple 3D observation systems in the electrical resistivity tomography method: mathematical, physical modeling and field experiment KW 3D observation systems KW electrical resistivity tomography KW modeling. JO Vestnik AGGE AU Balkov, E.V. AU Karin, Y.G. AU Shaparenko, I.O. AU Marinenko, A.V. PY 2025 IS 1 PB Association of Geologists, Geophysicists and Engineers