%0 Journal Article %A Paolo Tilli %T On a constrained variational problem with an arbitrary number of free boundaries %J Interfaces and free boundaries %D 2000 %P 201-212 %V 2 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4171/ifb/18/ %R 10.4171/ifb/18 %F 10_4171_ifb_18