TY - JOUR AU - I. V. Boykov AU - V. A. Ryazantsev TI - An approximate method for solving the inverse coefficient problem JO - Sibirskij žurnal industrialʹnoj matematiki PY - 2021 SP - 5 EP - 22 VL - 24 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SJIM_2021_24_2_a0/ LA - ru ID - SJIM_2021_24_2_a0 ER -