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@article{IM_1986__85_143377, author = {D. Zagier and J. Harer}, title = {The {Euler} characteristic of the moduli space of curves.}, journal = {Inventiones mathematicae}, pages = {457--486}, publisher = {mathdoc}, volume = {85}, year = {1986}, zbl = {0616.14017}, url = {http://geodesic.mathdoc.fr/item/IM_1986__85_143377/} }
D. Zagier; J. Harer. The Euler characteristic of the moduli space of curves.. Inventiones mathematicae, Tome 85 (1986), pp. 457-486. http://geodesic.mathdoc.fr/item/IM_1986__85_143377/