@article{MZ_1962__79_170066,
     author = {Vincent F. Cowling},
     title = {Summability of subclasses of convergent.},
     journal = {Mathematische Zeitschrift},
     pages = {250--253},
     publisher = {mathdoc},
     volume = {79},
     year = {1962},
     zbl = {0109.28601},
     url = {http://geodesic.mathdoc.fr/item/MZ_1962__79_170066/}
}