@article{IM_1983__72_143018,
     author = {John Harer},
     title = {The {Second} {Homology} {Group} of the {Mapping} {Class} {Group} of an {Orientable} {Surface.}},
     journal = {Inventiones mathematicae},
     pages = {221},
     publisher = {mathdoc},
     volume = {72},
     year = {1983},
     zbl = {0533.57003},
     language = {un},
     url = {https://geodesic-test.mathdoc.fr/item/IM_1983__72_143018/}
}