@article{FAA_1981_15_2_a6,
     author = {M. Sh. Braverman and A. A. Sedaev},
     title = {A characteristic of symmetrical spaces},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {65--66},
     publisher = {mathdoc},
     volume = {15},
     number = {2},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1981_15_2_a6/}
}