@article{MM2_1975__15_154306,
     author = {Rolf Trautner},
     title = {Hausdorff-Summability of {Power} {Series} {II.}},
     journal = {Manuscripta mathematica},
     pages = {45--64},
     publisher = {mathdoc},
     volume = {15},
     year = {1975},
     zbl = {0303.40014},
     url = {http://geodesic.mathdoc.fr/item/MM2_1975__15_154306/}
}