@article{MZ_1929__29_168093,
     author = {G. P\'olya},
     title = {Untersuchungen \"uber {L\"ucken} und {Singularit\"aten} von {Potenzreihen.}},
     journal = {Mathematische Zeitschrift},
     pages = {549--640},
     publisher = {mathdoc},
     volume = {29},
     year = {1929},
     zbl = {55.0186.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1929__29_168093/}
}