@article{MOMA_1975__80_177703,
     author = {Eugen Beck},
     title = {\"Uber komplement\"are {Ungleichungen} mit drei {Mittelwerten.} {Teil} 1.},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {13--30},
     publisher = {mathdoc},
     volume = {80},
     year = {1975},
     zbl = {0314.26012},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1975__80_177703/}
}