@Article{ 
  mag03a,
  author = { Magnani, Valentino },
  title = { Lipschitz continuity, Aleksandrov theorem and characterizations for H-convex functions },
  journal = { Math. Ann. },
  year = { 2006 },
  volume = { 334 },
  pages = { 199-233 },
  URL = { http://cvgmt.sns.it/paper/606/ },
  note = { cvgmt preprint}
}