@Article{ 
  checon08,
  author = { Chermisi, Milena and Conti, Sergio },
  title = { Multiwell rigidity in nonlinear elasticity },
  journal = { SIAM J. Math. Anal. },
  year = { 2010 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1105/ },
  note = { cvgmt preprint}
}