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@article{IM_1994__116_1-3_144191, author = {Peter Littelmann}, title = {A {Littlewood-Richardson} rule for symmetrizable {Kac-Moody} algebras.}, journal = {Inventiones mathematicae}, pages = {329--346}, publisher = {mathdoc}, volume = {116}, number = {1-3}, year = {1994}, zbl = {0805.17019}, url = {http://geodesic.mathdoc.fr/item/IM_1994__116_1-3_144191/} }
Peter Littelmann. A Littlewood-Richardson rule for symmetrizable Kac-Moody algebras.. Inventiones mathematicae, Tome 116 (1994) no. 1-3, pp. 329-346. http://geodesic.mathdoc.fr/item/IM_1994__116_1-3_144191/