no. 3
Dunkl operators, Bessel functions and the discriminant of a finite Coxeter group
Compositio Mathematica, Tome 85 (1993) no. 3, pp. 333-373. 
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     title = {Dunkl operators, {Bessel} functions and the discriminant of a finite {Coxeter} group},
     journal = {Compositio Mathematica},
     pages = {333--373},
     publisher = {Kluwer Academic Publishers},
     volume = {85},
     number = {3},
     year = {1993},
     mrnumber = {1214452},
     zbl = {0778.33009},
     language = {en},
     url = {http://www.numdam.org/item/CM_1993__85_3_333_0/}
}
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Opdam, E. M. Dunkl operators, Bessel functions and the discriminant of a finite Coxeter group. Compositio Mathematica, Tome 85 (1993) no. 3, pp. 333-373. http://www.numdam.org/item/CM_1993__85_3_333_0/

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