TY  - JOUR
AU  - James Lepowsky
AU  - Robert V. Moody
TI  - Hyperbolic Lie Algebras and Quasi-Regular Cusps on Hilbert  Modular Surfaces.
JO  - Mathematische Annalen
PY  - 1979
SP  - 63
EP  - 88
VL  - 245
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAN_1979__245_163311/
ID  - MAN_1979__245_163311
ER  -