@Article{ 
  AreMetPal6,
  author = { Arendt, Wolfgang and Metafune, Giorgio and Pallara, Diego },
  title = { Schroedinger Operators with Unbounded Drift },
  journal = { J. Oper. Theory },
  year = { 2006 },
  volume = { 55 },
  pages = { 101-127 },
  URL = { http://cvgmt.sns.it/paper/2425/ },
  note = { cvgmt preprint}
}