@Misc{ 
  ManMar16,
  author = { Mancini, Gabriele and Martinazzi, Luca },
  title = { The Moser-Trudinger inequality and its extremals on a disk via energy
  estimates },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/3954/ },
  note = { cvgmt preprint}
}