@article{CMH_1944__17_138860,
     author = {Wilhelm Blaschke},
     title = {\"Uber fl\"achenl\"aufige {Bewegungsvorg\"ange.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {278--282},
     publisher = {mathdoc},
     volume = {17},
     year = {1944},
     url = {http://geodesic.mathdoc.fr/item/CMH_1944__17_138860/}
}