%0 Journal Article %A Ricceri, Biagio %T Uniqueness properties of functionals with Lipschitzian derivative. %J Portugaliae mathematica %D 2006 %P 393-400 %V 63 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_2006__63_4_53795/ %G en %F PORMA_2006__63_4_53795