@article{AFM_2006_31_1_a3,
     author = {Joaquim Mart{\'\i}n and Javier Soria},
     title = {Characterization of rearrangement invariant spaces with fixed points for the {Hardy-Littlewood} maximal operator},
     journal = {Annales Fennici Mathematici},
     pages = {39--46},
     publisher = {mathdoc},
     volume = {31},
     number = {1},
     year = {2006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2006_31_1_a3/}
}