@article{IM_1989__98_1_143717,
     author = {E.M. Opdam},
     title = {Some applications of hypergeometric shift operators.},
     journal = {Inventiones mathematicae},
     pages = {1--18},
     publisher = {mathdoc},
     volume = {98},
     number = {1},
     year = {1989},
     zbl = {0696.33006},
     url = {http://geodesic.mathdoc.fr/item/IM_1989__98_1_143717/}
}