@article{DAN_1990_315_3_a3,
     author = {\`E. L. Radzhabov},
     title = {A generalization of operators of fractional integration and},
     journal = {Doklady Akademii Nauk},
     pages = {533--535},
     publisher = {mathdoc},
     volume = {315},
     number = {3},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_315_3_a3/}
}