@article{MZ_1953__59_169385,
     author = {G.G. Lorentz and M.S. Macphail},
     title = {Direct theorems on methods of summability {III:} absolute summabilty functions.},
     journal = {Mathematische Zeitschrift},
     pages = {231--246},
     publisher = {mathdoc},
     volume = {59},
     year = {1953},
     zbl = {0053.03603},
     url = {http://geodesic.mathdoc.fr/item/MZ_1953__59_169385/}
}