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@article{MAT_1968_12_6_a5, author = {D. Mumford}, title = {Abelian quotients of the {Teichm\"uller} modular group}, journal = {Matematika}, pages = {67--79}, publisher = {mathdoc}, volume = {12}, number = {6}, year = {1968}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MAT_1968_12_6_a5/} }
D. Mumford. Abelian quotients of the Teichm\"uller modular group. Matematika, Tome 12 (1968) no. 6, pp. 67-79. http://geodesic.mathdoc.fr/item/MAT_1968_12_6_a5/