no. 1
Orbits of the Weyl group and a theorem of DeConcini and Procesi
Compositio Mathematica, Tome 60 (1986) no. 1, pp. 45-52. 
@article{CM_1986__60_1_45_0,
     author = {Carrell, James},
     title = {Orbits of the Weyl group and a theorem of DeConcini and Procesi},
     journal = {Compositio Mathematica},
     pages = {45--52},
     publisher = {Martinus Nijhoff Publishers},
     volume = {60},
     number = {1},
     year = {1986},
     zbl = {0613.20029},
     mrnumber = {867955},
     language = {en},
     url = {www.numdam.org/item/CM_1986__60_1_45_0/}
}
Carrell, James B. Orbits of the Weyl group and a theorem of DeConcini and Procesi. Compositio Mathematica, Tome 60 (1986) no. 1, pp. 45-52. http://www.numdam.org/item/CM_1986__60_1_45_0/

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