@article{MZ_1939__45_168847,
     author = {J., Heinhold},
     title = {Verallgemeinerung und {Versch\"arfung} eines {Minkowskischen} {Satzes.} {II.}},
     journal = {Mathematische Zeitschrift},
     pages = {176--184},
     publisher = {mathdoc},
     volume = {45},
     year = {1939},
     zbl = {0020.29401},
     url = {http://geodesic.mathdoc.fr/item/MZ_1939__45_168847/}
}