@article{MOMA_1951__55_176864,
     author = {M. Pinl},
     title = {\"Uber einen {Satz} von {L.} {Berwald} und die {Gau{\ss}sche} {Kr\"ummung} der {Minimalfl\"achen.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {188--199},
     publisher = {mathdoc},
     volume = {55},
     year = {1951},
     zbl = {0043.15703},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1951__55_176864/}
}