@Article{ 
  For13,
  author = { Fornaro, Simona and Metafune, Giorgio and Pallara, Diego and Schnaubelt, Roland },
  title = { Degenerate operators of Tricomi type in $L^p$-spaces and in spaces of continuous functions },
  journal = { J. Diff. Eq. },
  year = { 2012 },
  volume = { 252 },
  pages = { 1182-1212 },
  URL = { http://cvgmt.sns.it/paper/2310/ },
  note = { cvgmt preprint}
}