%0 Journal Article %A Kamoliddin T. Karimov %T Nonlocal problem for a three-dimensional elliptic equation with singular coefficients in a rectangular parallelepiped %J Žurnal Sibirskogo federalʹnogo universiteta. Matematika i fizika %D 2020 %P 533-546 %V 13 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/JSFU_2020_13_5_a1/ %G en %F JSFU_2020_13_5_a1