@article{JDM_1918__27_145540,
     author = {P. St\"ackel},
     title = {Grenz\"uberg\"ange in der {Kr\"ummungslehre.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {142--157},
     publisher = {mathdoc},
     volume = {27},
     year = {1918},
     zbl = {46.1075.01},
     url = {http://geodesic.mathdoc.fr/item/JDM_1918__27_145540/}
}