@article{MZ_1964__86_170349,
     author = {G.C.N. Kulshrestha},
     title = {Absolute {Riesz} summability factors of infinite series.},
     journal = {Mathematische Zeitschrift},
     pages = {365--371},
     publisher = {mathdoc},
     volume = {86},
     year = {1964},
     zbl = {0128.28401},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__86_170349/}
}