%0 Journal Article %A M. M. Lavrent'ev %T Two classes of problems of integral geometry on the plane %J Doklady Akademii Nauk %D 1988 %P 1350-1352 %V 302 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1988_302_6_a15/ %G ru %F DAN_1988_302_6_a15