@Misc{ 
  MülOlb12a,
  author = { Müller, Stefan and Olbermann, Heiner },
  title = { Almost conical deformations of thin sheets with rotational symmetry },
  journal = {  },
  year = { 2012 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4381/ },
  note = { cvgmt preprint}
}