@Misc{ 
  BehOlb16,
  author = { Behr, Sören and Olbermann, Heiner },
  title = { Extrinsic curvature of codimension one isometric immersions with
  Hölder continuous derivatives },
  journal = {  },
  year = { 2016 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4389/ },
  note = { cvgmt preprint}
}