@article{JCA_2011_18_4_JCA_2011_18_4_a5,
     author = {C. Babaoglu and H. Shahgholian},
     title = {Symmetry in {Multi-Phase} {Overdetermined} {Problems}},
     journal = {Journal of convex analysis},
     pages = {1013--1024},
     publisher = {mathdoc},
     volume = {18},
     number = {4},
     year = {2011},
     url = {http://geodesic.mathdoc.fr/item/JCA_2011_18_4_JCA_2011_18_4_a5/}
}