@article{JCA_1995_2_1-2_a5,
     author = {G. Buttazzo and V. J. Mizel},
     title = {On a {Gap} {Phenomenon} for {Isoperimetrically} {Constrained} {Variational} {Problems}},
     journal = {Journal of convex analysis},
     pages = {087--102},
     publisher = {mathdoc},
     volume = {2},
     number = {1-2},
     year = {1995},
     url = {http://geodesic.mathdoc.fr/item/JCA_1995_2_1-2_a5/}
}