@article{10_4064_sm_130_1_67_75,
     author = {Gianfranco Marletta and Fulvio Ricci and Jacek Zienkiewicz},
     title = {Two-parameter maximal functions associated with degenerate homogeneous surfaces in {\ensuremath{\mathbb{R}}{\textthreesuperior}}},
     journal = {Studia Mathematica},
     pages = {67--75},
     year = {1998},
     volume = {130},
     number = {1},
     doi = {10.4064/sm-130-1-67-75},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-130-1-67-75/}
}