@Misc{ 
  Pis17,
  author = { Piscitelli, Gianpaolo },
  title = { The anisotropic $\infty$-Laplacian eigenvalue problem with Neumann
  boundary conditions },
  journal = {  },
  year = { 2017 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5704/ },
  note = { cvgmt preprint}
}