@article{10_4064_sm194_3_3,
     author = {J. M. Aldaz and F. J. P\'erez L\'azaro},
     title = {Regularity of the {Hardy{\textendash}Littlewood
} maximal operator on block decreasing functions},
     journal = {Studia Mathematica},
     pages = {253--277},
     year = {2009},
     volume = {194},
     number = {3},
     doi = {10.4064/sm194-3-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm194-3-3/}
}