@article{MOMA_1964__68_177263,
     author = {Wm. J. Firey},
     title = {A {Generalization} of an {Inequality} of {H.} {Groemer.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {393--395},
     publisher = {mathdoc},
     volume = {68},
     year = {1964},
     zbl = {0133.15802},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1964__68_177263/}
}