@article{EXMA_2006__15_4_224504,
     author = {Jackson, Steven Glenn and No\"el, Alfred G.},
     title = {Prehomogeneous spaces associated with nilpotent orbits in simple real {Lie} algebras  and  and their relative invariants.},
     journal = {Experimental mathematics},
     pages = {455--469},
     publisher = {mathdoc},
     volume = {15},
     number = {4},
     year = {2006},
     zbl = {1148.17004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_2006__15_4_224504/}
}