Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{MAN_1979__245_163311, author = {James Lepowsky and Robert V. Moody}, title = {Hyperbolic {Lie} {Algebras} and {Quasi-Regular} {Cusps} on {Hilbert} {Modular} {Surfaces.}}, journal = {Mathematische Annalen}, pages = {63--88}, publisher = {mathdoc}, volume = {245}, year = {1979}, zbl = {0396.17007}, url = {http://geodesic.mathdoc.fr/item/MAN_1979__245_163311/} }
James Lepowsky; Robert V. Moody. Hyperbolic Lie Algebras and Quasi-Regular Cusps on Hilbert Modular Surfaces.. Mathematische Annalen, Tome 245 (1979), pp. 63-88. http://geodesic.mathdoc.fr/item/MAN_1979__245_163311/