@article{ELMA_1949__4_140521,
     author = {L. Locher-Ernst},
     title = {Das {Imagin\"are} in der {Geometrie.} {II.}},
     journal = {Elemente der Mathematik},
     pages = {121--128},
     publisher = {mathdoc},
     volume = {4},
     year = {1949},
     zbl = {0034.24101},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1949__4_140521/}
}