Root systems and hypergeometric functions. I
Heckman, G. J. ; Opdam, E. M.
Compositio Mathematica, Tome 61 (1987), p. 329-352 / Harvested from Numdam
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@article{CM_1987__64_3_329_0,
     author = {Heckman, G. J. and Opdam, E. M.},
     title = {Root systems and hypergeometric functions. I},
     journal = {Compositio Mathematica},
     volume = {61},
     year = {1987},
     pages = {329-352},
     mrnumber = {918416},
     zbl = {0656.17006},
     language = {en},
     url = {http://dml.mathdoc.fr/item/CM_1987__64_3_329_0}
}

Heckman, G. J.; Opdam, E. M. Root systems and hypergeometric functions. I. Compositio Mathematica, Tome 61 (1987) pp. 329-352. http://gdmltest.u-ga.fr/item/CM_1987__64_3_329_0/

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