%0 Journal Article %A L. B. Vertgeim %T Integral geometry with a matrix weight and a nonlinear problem of %J Doklady Akademii Nauk %D 1991 %P 531-534 %V 319 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1991_319_3_a3/ %G ru %F DAN_1991_319_3_a3