@Article{ 
  ButWag0,
  author = { Buttazzo, Giuseppe and Wagner, Alfred },
  title = { On the optimal shape of a rigid body supported by an elastic membrane },
  journal = { Nonlinear Anal. },
  year = { 2000 },
  doi = { 10.1016/S0362-546X(98)00163-1 },
  volume = { 39 },
  pages = { 47-63 },
  URL = { http://cvgmt.sns.it/paper/3655/ },
  note = { cvgmt preprint}
}