@Article{ 
  cupmar10,
  author = { Cupini, Giovanni and Marcelli, Cristina },
  title = { Monotonicity properties of minimizers and relaxation for autonomous variational problems },
  journal = { ESAIM Control Optim. Calc. Var. },
  year = { 2011 },
  volume = { 17 },
  pages = { 222-242 },
  URL = { http://cvgmt.sns.it/paper/783/ },
  note = { cvgmt preprint}
}