@article{MAN_1932__106_159544,
     author = {P. Thullen},
     title = {Zur {Theorie} der {Singularit\"aten} der {Funktionen} zweier komplexen {Ver\"anderlichen.} {Die} {Regularit\"atsh\"ullen}},
     journal = {Mathematische Annalen},
     pages = {LXIV--LXXVI},
     publisher = {mathdoc},
     volume = {106},
     year = {1932},
     zbl = {0003.26303},
     url = {http://geodesic.mathdoc.fr/item/MAN_1932__106_159544/}
}