@article{AMBP_2006__13_1_87_0,
     author = {Vallarino, Maria},
     title = {A maximal function on harmonic extensions of $H$-type groups},
     journal = {Annales math\'ematiques Blaise Pascal},
     pages = {87--101},
     publisher = {Annales math\'ematiques Blaise Pascal},
     volume = {13},
     number = {1},
     year = {2006},
     doi = {10.5802/ambp.214},
     zbl = {1137.43003},
     mrnumber = {2233012},
     language = {en},
     url = {http://www.numdam.org/articles/10.5802/ambp.214/}
}