@article{SM_1997_188_11_a2,
     author = {A. Yu. Ol'shanskii},
     title = {On subgroup distortion in finitely presented groups},
     journal = {Sbornik. Mathematics},
     pages = {1617--1664},
     publisher = {mathdoc},
     volume = {188},
     number = {11},
     year = {1997},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1997_188_11_a2/}
}