@article{MAN_1910__69_158479,
     author = {E. Salkowski},
     title = {Beitr\"age zur {Kenntnis} der {Bertrandschen} {Kurven.} {(Mit} 6 {Figuren} im {Text)}},
     journal = {Mathematische Annalen},
     pages = {560--579},
     publisher = {mathdoc},
     volume = {69},
     year = {1910},
     zbl = {41.0682.05},
     url = {http://geodesic.mathdoc.fr/item/MAN_1910__69_158479/}
}