@Article{ 
  dongre,
  author = { D'Onofrio, Luigi and Greco, Luigi },
  title = { A counter example in $G$-convergence of nondivergence elliptic operators },
  journal = { Proceedings of the Royal society of Edinburgh },
  year = { 2003 },
  volume = { 133A },
  pages = { 1299-1310 },
  URL = { http://cvgmt.sns.it/paper/1279/ },
  note = { cvgmt preprint}
}