%0 Journal Article %A V. I. Gryn' %T Inverse problems of the determining the absorption coefficient and the de-excitation function for certain spatial domains %J Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki %D 1993 %P 578-599 %V 33 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/ZVMMF_1993_33_4_a6/ %G ru %F ZVMMF_1993_33_4_a6