@Misc{ 
  nirnei04,
  author = { Chaudhuri, Nirmalendu and Trudinger, Neil S. },
  title = { A note on Alexsandrov type theorem for k-convex functions },
  journal = {  },
  year = { 2004 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/1648/ },
  note = { cvgmt preprint}
}