%0 Journal Article %A M. V. Balashov %T Weak Convexity of the Distance Function %J Journal of convex analysis %D 2013 %P 93-106 %V 20 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/JCA_2013_20_1_JCA_2013_20_1_a5/ %F JCA_2013_20_1_JCA_2013_20_1_a5