@article{MZ_1943__49_169020,
     author = {H. Claus},
     title = {Neue {Bedingungen} f\"ur die {Nichtfortsetzbarkeit} von {Potenzreihen}},
     journal = {Mathematische Zeitschrift},
     pages = {161--191},
     publisher = {mathdoc},
     volume = {49},
     year = {1943},
     zbl = {0028.15002},
     url = {http://geodesic.mathdoc.fr/item/MZ_1943__49_169020/}
}