@article{GDZPPN002109689,
title = {Lie algebras graded by finite root systems and the intersection matrix algebras of Slodowy.},
journal = {Inventiones mathematicae},
volume = {110},
year = {1992},
pages = {323-348},
zbl = {0778.17018},
url = {http://dml.mathdoc.fr/item/GDZPPN002109689}
}
Berman, S.; Moody, R.V. Lie algebras graded by finite root systems and the intersection matrix algebras of Slodowy.. Inventiones mathematicae, Tome 110 (1992) pp. 323-348. http://gdmltest.u-ga.fr/item/GDZPPN002109689/