%0 Journal Article %A Endre Suli %T A Gagliardo-Nirenberg inequality, with application to duality-based a posteriori estimation in the L^1 norm %J Kragujevac Journal of Mathematics %D 2007 %P 27 %V 30 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2007_30_a2/ %G en %F KJM_2007_30_a2