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@article{CM_1936__3__441_0, author = {Cohn-Vossen, Stefan}, title = {Existenz k\"urzester {Wege}}, journal = {Compositio Mathematica}, pages = {441--452}, publisher = {Johnson Reprint Corporation}, volume = {3}, year = {1936}, zbl = {0015.12304}, language = {de}, url = {http://geodesic.mathdoc.fr/item/CM_1936__3__441_0/} }
Cohn-Vossen, Stefan. Existenz kürzester Wege. Compositio Mathematica, Tome 3 (1936), pp. 441-452. http://geodesic.mathdoc.fr/item/CM_1936__3__441_0/