@article{DAN_1991_318_4_a4,
     author = {I. M. Gel'fand and M. I. Graev and V. S. Retakh},
     title = {Reduction formulas for hypergeometric functions on the},
     journal = {Doklady Akademii Nauk},
     pages = {793--797},
     publisher = {mathdoc},
     volume = {318},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_318_4_a4/}
}