@Misc{ 
  MugRin12,
  author = { Mugnai, Dimitri and Rinaldi, Matteo },
  title = { Spinning Q-balls in Abelian Gauge Theories with positive potentials: existence and non existence },
  journal = { Calculus of Variations and Partial Differential Equations },
  year = { 2015 },
  doi = { 10.1007/s00526-014-0739-4 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1853/ },
  note = { cvgmt preprint}
}