%0 Journal Article %A Mohammad Safdari %T On the shape of the free boundary of variational inequalities with gradient constraints %J Interfaces and free boundaries %D 2017 %P 183-200 %V 19 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4171/ifb/380/ %R 10.4171/ifb/380 %F 10_4171_ifb_380