@article{MAN_1980__248_163378,
     author = {David A. jr. Vogan},
     title = {Ordering of the {Primitive} {Spectrum} of a {Semisimple} {Lie} {Algebra.}},
     journal = {Mathematische Annalen},
     pages = {195--204},
     publisher = {mathdoc},
     volume = {248},
     year = {1980},
     zbl = {0414.17006},
     url = {http://geodesic.mathdoc.fr/item/MAN_1980__248_163378/}
}