@article{MZ_1964__83_170207,
     author = {O.P. Varshney},
     title = {On the absolute {N\"orlund} summability of a {Fourier} series.},
     journal = {Mathematische Zeitschrift},
     pages = {18--24},
     publisher = {mathdoc},
     volume = {83},
     year = {1964},
     zbl = {0116.27802},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__83_170207/}
}