%0 Journal Article %A Alexander I. Kozhanov %A Tatyana N. Shipina %T Inverse problems of finding the lowest coefficient in the elliptic equation %J Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika %D 2021 %P 528-542 %V 14 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/JSFU_2021_14_4_a14/ %G en %F JSFU_2021_14_4_a14