@article{10_4064_sm_57_3_297_306,
     author = {A. Calder\'on},
     title = {Inequalities for the maximal function relative to a metric},
     journal = {Studia Mathematica},
     pages = {297--306},
     publisher = {mathdoc},
     volume = {57},
     number = {3},
     year = {1976},
     doi = {10.4064/sm-57-3-297-306},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-57-3-297-306/}
}