@article{MAN_1959__137_160670,
     author = {W. BARTHEL},
     title = {\"Uber metrische {Differentialgeometrie,} begr\"undet auf dem {Begriff} eines p-dimensionalen {Areals.}},
     journal = {Mathematische Annalen},
     pages = {42--63},
     publisher = {mathdoc},
     volume = {137},
     year = {1959},
     zbl = {0083.37503},
     url = {http://geodesic.mathdoc.fr/item/MAN_1959__137_160670/}
}