@Misc{ 
  Fri15a,
  author = { Friedrich, Manuel },
  title = { A derivation of linearized Griffith energies from nonlinear models },
  journal = {  },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2724/ },
  note = { cvgmt preprint}
}