@article{MAN_1938__115_159986,
     author = {I. Johansson},
     title = {\"Uber singul\"are {Elementarfl\"achen} und das {Dehnsche} {Lemma} {II.}},
     journal = {Mathematische Annalen},
     pages = {658--669},
     publisher = {mathdoc},
     volume = {115},
     year = {1938},
     zbl = {64.0599.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1938__115_159986/}
}