@Misc{ 
  BraNitTro14,
  author = { Brasco, Lorenzo and Nitsch, Carlo and Trombetti, Cristina },
  title = { An inequality à la Szego-Weinberger for the $p-$Laplacian on convex sets },
  journal = { Commun. Contemp. Math. },
  year = { 2015 },
  pages = { 22 },
  URL = { http://cvgmt.sns.it/paper/2491/ },
  note = { cvgmt preprint}
}