@article{ELMA_1950__5_140527,
     author = {Ernst V\"ollm},
     title = {\"Uber die {Rektifikation} eines {Kurvenbogens.}},
     journal = {Elemente der Mathematik},
     pages = {4--7},
     year = {1950},
     volume = {5},
     zbl = {0034.23904},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1950__5_140527/}
}