@article{FAA_2004_38_4_a10,
     author = {P. V. Tumarkin and A. A. Felikson},
     title = {Reflection {Subgroups} of {Reflection} {Groups}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {90--92},
     publisher = {mathdoc},
     volume = {38},
     number = {4},
     year = {2004},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2004_38_4_a10/}
}