%0 Journal Article %A Chang-Pao Chen %T Two-parameter Hardy-Littlewood inequality and its variants %J Studia Mathematica %D 2000 %P 9-27 %V 139 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-139-1-9-27/ %R 10.4064/sm-139-1-9-27 %G en %F 10_4064_sm_139_1_9_27