@article{IM_1985__81_143246,
     author = {Vyjayanthi Chari},
     title = {Annihilators of {Verma} modules for {Kac-Moody} algebras.},
     journal = {Inventiones mathematicae},
     pages = {47--58},
     year = {1985},
     volume = {81},
     zbl = {0584.17008},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__81_143246/}
}