@article{MZ_1949__51_169089,
     author = {A., Dinghas},
     title = {Neuer {Beweis} einer isoperimetrischen {Ungleichung} von {Bol}},
     journal = {Mathematische Zeitschrift},
     pages = {469--473},
     publisher = {mathdoc},
     volume = {51},
     year = {1949},
     zbl = {0031.07902},
     url = {http://geodesic.mathdoc.fr/item/MZ_1949__51_169089/}
}