@Misc{ 
  Maz13,
  author = { Mazzoleni, Dario },
  title = { Boundedness of minimizers for spectral problems in $\mathbb{R}^N$ },
  journal = { Rend. Sem. Mat. Univ. Padova },
  year = { 2014 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2106/ },
  note = { cvgmt preprint}
}