@article{CMJ_2000_50_1_a13,
     author = {Aldaz, J. M.},
     title = {A remark on the centered $n$-dimensional {Hardy-Littlewood} maximal function},
     journal = {Czechoslovak Mathematical Journal},
     pages = {103--112},
     year = {2000},
     volume = {50},
     number = {1},
     mrnumber = {1745465},
     zbl = {1037.42021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2000_50_1_a13/}
}