@Misc{ 
  KhlNeg12a,
  author = { Khludnev, Alexandr and Negri, Matteo },
  title = { Optimal rigid inclusion shapes in elastic bodies with cracks. },
  journal = { Z. Angew. Math. Phys. },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1879/ },
  note = { cvgmt preprint}
}