@Misc{ 
  Fri15,
  author = { Friedrich, Manuel },
  title = { A Korn-Poincare-type inequality for special functions of bounded deformation },
  journal = {  },
  year = { 2015 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2722/ },
  note = { cvgmt preprint}
}