@article{DAN_1986_289_1_a2,
     author = {I. M. Gel'fand and M. I. Graev},
     title = {A duality theorem for general hypergeometric functions},
     journal = {Doklady Akademii Nauk},
     pages = {19--23},
     publisher = {mathdoc},
     volume = {289},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_289_1_a2/}
}