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@article{DAN_1986_286_5_a6, author = {N. A. Gusevskii and N. S. Zindinova}, title = {A characterization of extended {Schottky} groups}, journal = {Doklady Akademii Nauk}, pages = {1054--1057}, publisher = {mathdoc}, volume = {286}, number = {5}, year = {1986}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1986_286_5_a6/} }
N. A. Gusevskii; N. S. Zindinova. A characterization of extended Schottky groups. Doklady Akademii Nauk, Tome 286 (1986) no. 5, pp. 1054-1057. http://geodesic.mathdoc.fr/item/DAN_1986_286_5_a6/