%0 Journal Article %A J. P. Moreno %A A. Seeger %T External Analysis of Boundary Points of Convex Sets: Supporting Cones and Drops %J Journal of convex analysis %D 2009 %P 939-957 %V 16 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/JCA_2009_16_3_JCA_2009_16_3_a22/ %F JCA_2009_16_3_JCA_2009_16_3_a22