Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{IM_1980__61_142750, author = {Eduard Looijenga}, title = {Invariant {Theory} for {Generalized} {Root} {Systems.}}, journal = {Inventiones mathematicae}, pages = {1--32}, publisher = {mathdoc}, volume = {61}, year = {1980}, zbl = {0436.17005}, url = {http://geodesic.mathdoc.fr/item/IM_1980__61_142750/} }
Eduard Looijenga. Invariant Theory for Generalized Root Systems.. Inventiones mathematicae, Tome 61 (1980), pp. 1-32. http://geodesic.mathdoc.fr/item/IM_1980__61_142750/