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@article{MAN_1982__260_163672, author = {G. van der Geer}, title = {On the {Geometry} of a {Siegel} {Modular} {Threefold.}}, journal = {Mathematische Annalen}, pages = {317--350}, publisher = {mathdoc}, volume = {260}, year = {1982}, zbl = {0473.14017}, url = {http://geodesic.mathdoc.fr/item/MAN_1982__260_163672/} }
G. van der Geer. On the Geometry of a Siegel Modular Threefold.. Mathematische Annalen, Tome 260 (1982), pp. 317-350. http://geodesic.mathdoc.fr/item/MAN_1982__260_163672/