%0 Journal Article %A I. V. Boykov %A V. A. Ryazantsev %T On the simultaneous restoration of the density and %J Sibirskij žurnal vyčislitelʹnoj matematiki %D 2020 %P 289-308 %V 23 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJVM_2020_23_3_a3/ %G ru %F SJVM_2020_23_3_a3