%0 Journal Article %A I. M. Gel'fand %A G. S. Shmelev %T Geometric structures of double bundles and their relation to certain problems in integral geometry %J Funkcionalʹnyj analiz i ego priloženiâ %D 1983 %P 7-22 %V 17 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1983_17_2_a1/ %G ru %F FAA_1983_17_2_a1