@article{FAA_2011_45_3_a6,
     author = {Yu. A. Neretin},
     title = {Sphericity and multiplication of double cosets for infinite-dimensional classical groups},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {79--96},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {2011},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2011_45_3_a6/}
}