@article{VMUMM_1992_2_a18,
     author = {V. A. Goryushkin},
     title = {An example of a generalized {Coxeter} group that is not an even subgroup of the {Coxeter} group},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {85--88},
     publisher = {mathdoc},
     number = {2},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1992_2_a18/}
}