@article{CMH_1962__37_139255,
     author = {W. Scherrer},
     title = {Die {Grundgleichungen} der {Fl\"achentheorie} {III.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {177--197},
     year = {1962},
     volume = {37},
     zbl = {0116.13403},
     url = {http://geodesic.mathdoc.fr/item/CMH_1962__37_139255/}
}