@article{FPM_1999_5_3_a4,
     author = {A. W. Niukkanen},
     title = {A~new theory of multiple hypogeometric series and its prospects for computer algebra programming},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {717--745},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1999},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_1999_5_3_a4/}
}