@article{FAA_2002_36_4_a3,
     author = {D. V. Osin},
     title = {Kazhdan {Constants} of {Hyperbolic} {Groups}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {46--54},
     publisher = {mathdoc},
     volume = {36},
     number = {4},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2002_36_4_a3/}
}