@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/}
}