@article{ADM_2004_2_a4,
     author = {Valery Beniash-Kryvets and Oxana Barkovich},
     title = {On the {Tits} alternative for some generalized triangle groups},
     journal = {Algebra and discrete mathematics},
     pages = {23--44},
     publisher = {mathdoc},
     number = {2},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2004_2_a4/}
}