@article{DAN_1958_120_4_a3,
     author = {A. M. Olevskii},
     title = {On linear methods of summation},
     journal = {Doklady Akademii Nauk},
     pages = {701--703},
     year = {1958},
     volume = {120},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1958_120_4_a3/}
}