%0 Journal Article %A Martin Bohner %A Bıllûr Kaymakçalan %T Opial inequalities on time scales %J Annales Polonici Mathematici %D 2001 %P 11-20 %V 77 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap77-1-2/ %R 10.4064/ap77-1-2 %G en %F 10_4064_ap77_1_2