@article{PMF_1906_17_1_a1,
     author = {\.Zorawski, K.},
     title = {\"Uber {Kr\"ummungseigenschaften} der {Scharen} von {Linienelementen.}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {41--76},
     publisher = {mathdoc},
     volume = {17},
     number = {1},
     year = {1906},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/PMF_1906_17_1_a1/}
}