@Misc{ 
  alecab07,
  author = { Alessandrini, Giovanni and Cabib, Elio },
  title = { Determining the anisotropic traction state in a membrane },
  journal = { IPI },
  year = { 2007 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/502/ },
  note = { cvgmt preprint}
}