@article{IM2_1971_5_5_a6,
     author = {\`E. B. Vinberg},
     title = {Discrete linear groups generated by reflections},
     journal = {Izvestiya. Mathematics },
     pages = {1083--1119},
     publisher = {mathdoc},
     volume = {5},
     number = {5},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_5_a6/}
}