@article{DAN_1992_324_5_a4,
     author = {Kh. P. Rustamov},
     title = {Characterization of fractional powers of the {Beltrami{\textendash}Laplace} operator on a sphere by means of fractional finite differences},
     journal = {Doklady Akademii Nauk},
     pages = {938--943},
     year = {1992},
     volume = {324},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1992_324_5_a4/}
}