@article{MZ_1928__28_168029,
     author = {A. F., Andersen},
     title = {Bemerkung zum {Beweis} des {Herrn} {Knopp} f\"ur die {\"Aquivalenz} der {Ces\`aro-} und {H\"older-Summabilit\"at}},
     journal = {Mathematische Zeitschrift},
     pages = {356--359},
     publisher = {mathdoc},
     volume = {28},
     year = {1928},
     zbl = {54.0236.01},
     url = {http://geodesic.mathdoc.fr/item/MZ_1928__28_168029/}
}