@article{JDM_1918__26_145514,
     author = {W. Blaschke and G. Hessenberg},
     title = {Lehrs\"atze \"uber konvexe {K\"orper.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {215--220},
     publisher = {mathdoc},
     volume = {26},
     year = {1918},
     zbl = {46.1110.02},
     url = {http://geodesic.mathdoc.fr/item/JDM_1918__26_145514/}
}