@article{10_4064_sm_134_1_57_67,
     author = {Loukas Grafakos and Stephen Montgomery-Smith and Olexei Motrunich},
     title = {A sharp estimate for the {Hardy-Littlewood} maximal function},
     journal = {Studia Mathematica},
     pages = {57--67},
     year = {1999},
     volume = {134},
     number = {1},
     doi = {10.4064/sm-134-1-57-67},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-134-1-57-67/}
}