@article{DAN_1964_155_3_a6,
     author = {L. V. Grepachevskaya},
     title = {On absolute summability by the methods of {Ces\`aro,} {Riesz} and {Zygmund}},
     journal = {Doklady Akademii Nauk},
     pages = {517--520},
     publisher = {mathdoc},
     volume = {155},
     number = {3},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_155_3_a6/}
}