@article{DE_1998_34_5_a1,
     author = {V. A. Sadovnichii and A. Yu. Popov},
     title = {On the completeness of systems of {Gauss} hypergeometric functions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {595--608},
     publisher = {mathdoc},
     volume = {34},
     number = {5},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_5_a1/}
}