%0 Journal Article %A I. M. Gel'fand %A M. I. Graev %T Crofton's function and inversion formulas in real integral geometry %J Funkcionalʹnyj analiz i ego priloženiâ %D 1991 %P 1-6 %V 25 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_1991_25_1_a0/ %G ru %F FAA_1991_25_1_a0