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@article{MAN_1987__278_164298, author = {Gerard van der Geer}, title = {Note on the {Abelian} {Schemes} of {Level} {Three.}}, journal = {Mathematische Annalen}, pages = {401--408}, publisher = {mathdoc}, volume = {278}, year = {1987}, zbl = {0688.14034}, url = {http://geodesic.mathdoc.fr/item/MAN_1987__278_164298/} }
Gerard van der Geer. Note on the Abelian Schemes of Level Three.. Mathematische Annalen, Tome 278 (1987), pp. 401-408. http://geodesic.mathdoc.fr/item/MAN_1987__278_164298/