@Misc{ 
  MonSch12,
  author = { Mondino, Andrea and Schygulla, Johannes },
  title = { Existence of immersed spheres minimizing curvature functionals in non-compact 3-manifolds },
  journal = { Annales IHP-Anal. Non Lin. },
  year = { 2012 },
  pages = { 19 },
  URL = { http://cvgmt.sns.it/paper/1727/ },
  note = { cvgmt preprint}
}