@article{SM_1995_186_8_a5,
     author = {A. Yu. Ol'shanskii},
     title = {The {SQ-universality} of hyperbolic groups},
     journal = {Sbornik. Mathematics},
     pages = {1199--1211},
     publisher = {mathdoc},
     volume = {186},
     number = {8},
     year = {1995},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1995_186_8_a5/}
}