@article{GDZPPN002099098,
title = {Singularities of Closures of K-orbits on Flag Manifolds.},
journal = {Inventiones mathematicae},
volume = {74},
year = {1983},
pages = {365-380},
zbl = {0544.14035},
url = {http://dml.mathdoc.fr/item/GDZPPN002099098}
}
Lusztig, George; Vogan, David A., Jr. Singularities of Closures of K-orbits on Flag Manifolds.. Inventiones mathematicae, Tome 74 (1983) pp. 365-380. http://gdmltest.u-ga.fr/item/GDZPPN002099098/