@Misc{ 
  gra06,
  author = { Graziani, Daniele },
  title = { On the $L^1$-lower semicontinuity and relaxation in $BV(\Omega; R^M)$ for integral functionals with discontinuous integrand  },
  journal = {  },
  year = { 2006 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/225/ },
  note = { cvgmt preprint}
}