%0 Journal Article %A Yu. A. Neretin %T Sphericity and multiplication of double cosets for infinite-dimensional classical groups %J Funkcionalʹnyj analiz i ego priloženiâ %D 2011 %P 79-96 %V 45 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/FAA_2011_45_3_a6/ %G ru %F FAA_2011_45_3_a6