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@article{MAN_1973__200_162337, author = {William F. Hammond}, title = {The {Hilbert} {Modular} {Surface} of a {Real} {Quadratic} {Field.}}, journal = {Mathematische Annalen}, pages = {25--46}, publisher = {mathdoc}, volume = {200}, year = {1973}, zbl = {0236.14014}, url = {http://geodesic.mathdoc.fr/item/MAN_1973__200_162337/} }
William F. Hammond. The Hilbert Modular Surface of a Real Quadratic Field.. Mathematische Annalen, Tome 200 (1973), pp. 25-46. http://geodesic.mathdoc.fr/item/MAN_1973__200_162337/