@Misc{ 
  Lu13,
  author = { Lu, Xin Yang },
  title = { Geometric and regularity properties of solutions of some problems related to the average distance functional },
  journal = {  },
  year = { 2013 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2287/ },
  note = { cvgmt preprint}
}