@article{MOMA_1959__63_177074,
     author = {Woldemar Barthel},
     title = {Zur {Minkowski-Geometrie,} begr\"undet auf dem {Fl\"acheninhaltsbegriff.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {317--343},
     publisher = {mathdoc},
     volume = {63},
     year = {1959},
     zbl = {0094.35202},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1959__63_177074/}
}