@article{10_1090_S0894_0347_00_00347_7,
     author = {Joseph, Anthony and Letzter, Gail and Zelikson, Shmuel},
     title = {On the {Brylinski-Kostant} filtration},
     journal = {Journal of the American Mathematical Society},
     pages = {945--970},
     publisher = {mathdoc},
     volume = {13},
     number = {4},
     year = {2000},
     doi = {10.1090/S0894-0347-00-00347-7},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-00-00347-7/}
}