@Misc{ 
  Olb17,
  author = { Olbermann, Heiner },
  title = { The shape of low energy configurations of a thin elastic sheet with a
  single disclination },
  journal = {  },
  year = { 2017 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4390/ },
  note = { cvgmt preprint}
}