@article{JDM_1931__40_145866,
     author = {Wilhelm Blaschke},
     title = {Neue {Str\"omungen} der {Differentialgeometrie.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {1--15},
     year = {1931},
     volume = {40},
     zbl = {0001.16401},
     url = {http://geodesic.mathdoc.fr/item/JDM_1931__40_145866/}
}