@article{DAN_1975_222_6_a1,
     author = {I. I. Ibragimov and N. I. Nagnibida},
     title = {On the {Whittaker} problem},
     journal = {Doklady Akademii Nauk},
     pages = {1269--1271},
     publisher = {mathdoc},
     volume = {222},
     number = {6},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_222_6_a1/}
}