%0 Journal Article %A Vladimir Demyanov %A Diethard Pallaschke %T Point derivations for Lipschitz functions andClarke's generalized derivative %J Applicationes Mathematicae %D 1997 %P 465-474 %V 24 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/am-24-4-465-474/ %R 10.4064/am-24-4-465-474 %G en %F 10_4064_am_24_4_465_474