@article{MZ_1940__46_168912,
     author = {H., Gericke},
     title = {Zur {Differentialgeometrie} von {Fl\"achen} im n-dimensionalen euklidischen {Raum.} {Adjungierte} {Extremalfl\"achen}},
     journal = {Mathematische Zeitschrift},
     pages = {408--459},
     publisher = {mathdoc},
     volume = {46},
     year = {1940},
     zbl = {66.0830.02},
     url = {http://geodesic.mathdoc.fr/item/MZ_1940__46_168912/}
}