@article{DAN_1964_158_1_a13,
     author = {A. K. Kharadze},
     title = {On the representation of ultraspherical polynomials in the form of a differential operator containing 
},
     journal = {Doklady Akademii Nauk},
     pages = {59--61},
     publisher = {mathdoc},
     volume = {158},
     number = {1},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_158_1_a13/}
}