%0 Journal Article %A Steven Bloom %T First and second order Opial inequalities %J Studia Mathematica %D 1997 %P 27-50 %V 126 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-126-1-27-50/ %R 10.4064/sm-126-1-27-50 %G en %F 10_4064_sm_126_1_27_50