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@article{DAN_1990_311_3_a4, author = {G. A. Soifer}, title = {Maximal subgroups of infinite index of lattices of semisimple {Lie} groups}, journal = {Doklady Akademii Nauk}, pages = {536--539}, publisher = {mathdoc}, volume = {311}, number = {3}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_3_a4/} }
G. A. Soifer. Maximal subgroups of infinite index of lattices of semisimple Lie groups. Doklady Akademii Nauk, Tome 311 (1990) no. 3, pp. 536-539. http://geodesic.mathdoc.fr/item/DAN_1990_311_3_a4/