%0 Journal Article %A Gianfranco Marletta %A Fulvio Ricci %T Two-parameter maximal functions associated with homogeneous surfaces in $ℝ^n$ %J Studia Mathematica %D 1998 %P 53-65 %V 130 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-130-1-53-65/ %R 10.4064/sm-130-1-53-65 %G en %F 10_4064_sm_130_1_53_65