@article{MZ_1920__6_167576,
     author = {O., Perron},
     title = {Beitrag zur {Theorie} der divergenten {Beihen}},
     journal = {Mathematische Zeitschrift},
     pages = {286--310},
     publisher = {mathdoc},
     volume = {6},
     year = {1920},
     zbl = {47.0198.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1920__6_167576/}
}