@article{JDM_1943__53_146341,
     author = {Hamel},
     title = {Wilhelm {Blaschke;} {Nichteuklidische} {Geometrie} und {Mechanik.I,} {II,} {III.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {56--57},
     publisher = {mathdoc},
     volume = {53},
     year = {1943},
     url = {http://geodesic.mathdoc.fr/item/JDM_1943__53_146341/}
}