@article{JCA_1997_4_2_a9,
     author = {G. Buttazzo and P. Guasoni},
     title = {Shape {Optimization} {Problems} over {Classes} of {Convex} {Domains}},
     journal = {Journal of convex analysis},
     pages = {343--352},
     year = {1997},
     volume = {4},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JCA_1997_4_2_a9/}
}