@article{JCA_2008_15_1_JCA_2008_15_1_a1,
     author = {L. Granieri and F. Maddalena},
     title = {Optimal {Shapes} in {Force} {Fields}},
     journal = {Journal of convex analysis},
     pages = {17--37},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2008},
     url = {http://geodesic.mathdoc.fr/item/JCA_2008_15_1_JCA_2008_15_1_a1/}
}