@Article{ 
  dapmug04,
  author = { D'Aprile, Teresa and Mugnai, Dimitri },
  title = { Non-Existence Results for the Coupled Klein-Gordon-Maxwell Equations },
  journal = { Adv. Nonlinear Stud. },
  year = { 2004 },
  volume = { 4 },
  number = { 3 },
  pages = { 307-322 },
  URL = { http://cvgmt.sns.it/paper/780/ },
  note = { cvgmt preprint}
}