@article{JDM_1921__30_145604,
     author = {E. Salkowski},
     title = {Eine neue {Klasse} von {Kurvenpaaren.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {91--99},
     publisher = {mathdoc},
     volume = {30},
     year = {1921},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JDM_1921__30_145604/}
}