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@article{MAN_1994__298_2_165176, author = {Seok-Jin Kang}, title = {Generalized {Kac-Moody} algebras and the modular function j.}, journal = {Mathematische Annalen}, pages = {373--384}, publisher = {mathdoc}, volume = {298}, number = {2}, year = {1994}, zbl = {0787.17022}, url = {http://geodesic.mathdoc.fr/item/MAN_1994__298_2_165176/} }
Seok-Jin Kang. Generalized Kac-Moody algebras and the modular function j.. Mathematische Annalen, Tome 298 (1994) no. 2, pp. 373-384. http://geodesic.mathdoc.fr/item/MAN_1994__298_2_165176/