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@article{DAN_1993_333_5_a1, author = {I. M. Gel'fand and M. I. Graev and V. S. Retakh}, title = {$(R,S)$-hypergeometric functions of one variable}, journal = {Doklady Akademii Nauk}, pages = {567--570}, publisher = {mathdoc}, volume = {333}, number = {5}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1993_333_5_a1/} }
I. M. Gel'fand; M. I. Graev; V. S. Retakh. $(R,S)$-hypergeometric functions of one variable. Doklady Akademii Nauk, Tome 333 (1993) no. 5, pp. 567-570. http://geodesic.mathdoc.fr/item/DAN_1993_333_5_a1/