@Misc{ 
  CanFlo11a,
  author = { Cannarsa, Piermarco and Floridia, Giuseppe },
  title = { Approximate multiplicative controllability for degenerate parabolic problems with Robin boundary conditions },
  journal = {  },
  year = { 2011 },
  doi = { 10.1685/journal.caim.376 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3694/ },
  note = { cvgmt preprint}
}