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@article{FAA_1987_21_2_a11, author = {N. V. Ivanov}, title = {Subgroups of {Teichm\"uller} modular groups and their {Frattini} subgroups}, journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a}, pages = {76--77}, publisher = {mathdoc}, volume = {21}, number = {2}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/FAA_1987_21_2_a11/} }
N. V. Ivanov. Subgroups of Teichm\"uller modular groups and their Frattini subgroups. Funkcionalʹnyj analiz i ego priloženiâ, Tome 21 (1987) no. 2, pp. 76-77. http://geodesic.mathdoc.fr/item/FAA_1987_21_2_a11/