@Misc{ 
  Flo14,
  author = { Floridia, Giuseppe },
  title = { Approximate controllability for nonlinear degenerate parabolic problems with bilinear control },
  journal = { Journal Differential Equations },
  year = { 2014 },
  doi = { 10.1016/j.jde.2014.06.016 },
  volume = { 257 },
  number = { 9 },
  pages = { 3382–3422 },
  URL = { http://cvgmt.sns.it/paper/3695/ },
  note = { cvgmt preprint}
}