@article{GDZPPN002307030,
title = {The Hilbert Modular Surface of a Real Quadratic Field.},
journal = {Mathematische Annalen},
volume = {201},
year = {1973},
pages = {25-46},
zbl = {0236.14014},
url = {http://dml.mathdoc.fr/item/GDZPPN002307030}
}
Hammond, William F. The Hilbert Modular Surface of a Real Quadratic Field.. Mathematische Annalen, Tome 201 (1973) pp. 25-46. http://gdmltest.u-ga.fr/item/GDZPPN002307030/