@article{MZ_1965__90_170465,
     author = {Hermann Schaal},
     title = {Zur lokalen affinen {Differentialgeometrie} ebener und gewundener {Fl\"achenkurven.} {Teil} {I:} {Ebene} {Fl\"achenkurven.}},
     journal = {Mathematische Zeitschrift},
     pages = {71--94},
     publisher = {mathdoc},
     volume = {90},
     year = {1965},
     zbl = {0136.16801},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__90_170465/}
}