@Article{ BucFraLam12, author = { Bucur, Dorin and FragalĂ , Ilaria and Lamboley, Jimmy }, title = { Optimal convex shapes for concave functionals }, journal = { ESAIM Control Optim. Calc. Var. }, year = { 2012 }, volume = { 18 }, number = { 3 }, pages = { 693-711 }, URL = { http://cvgmt.sns.it/paper/3061/ }, note = { cvgmt preprint} }