@article{MZ_1935__39_168585,
     author = {K. Knopp},
     title = {\"Uber die maximalen {Abst\"ande} und {Verh\"altnisse} verschiedener {Mittelwerte}},
     journal = {Mathematische Zeitschrift},
     pages = {768--776},
     publisher = {mathdoc},
     volume = {39},
     year = {1935},
     zbl = {0011.01203},
     url = {http://geodesic.mathdoc.fr/item/MZ_1935__39_168585/}
}