@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/}
}