@article{10_4064_sm_103_3_239_264,
     author = {Ewa Damek},
     title = {Maximal functions related to subelliptic operators invariant under an action of a nilpotent {Lie} group},
     journal = {Studia Mathematica},
     pages = {239--264},
     publisher = {mathdoc},
     volume = {103},
     number = {3},
     year = {1992},
     doi = {10.4064/sm-103-3-239-264},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-103-3-239-264/}
}