@Misc{ 
  FraObrVec13,
  author = { Franchi, Bruno and Obrecht, Enrico and Vecchi, Eugenio },
  title = { On a class of semilinear evolution equations for vector potentials associated with Maxwell's equations in Carnot groups },
  journal = {  },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2135/ },
  note = { cvgmt preprint}
}