@article{PFMT_2019_2_a6,
     author = {V. V. Beniash-Kryvets and Y. A. Yushkevich},
     title = {On the {Tits} alternative for generalized tetraedron groups of type $(2, 2, N, 2, 2, 2)$},
     journal = {Problemy fiziki, matematiki i tehniki},
     pages = {54--60},
     publisher = {mathdoc},
     number = {2},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/PFMT_2019_2_a6/}
}