@article{JDM_1921__30_145609,
     author = {P. Franck},
     title = {\"Uber paraboloidische {Fl\"achen.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {145--151},
     publisher = {mathdoc},
     volume = {30},
     year = {1921},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JDM_1921__30_145609/}
}