@Article{ 
  delmula,
  author = { De Lellis, Camillo and Müller, Stefan },
  title = { A $C^0$--estimate for nearly umbilical surfaces. },
  journal = { Calc. Var. Partial Differential Equations },
  year = { 2006 },
  volume = { 26 },
  number = { 3 },
  pages = { 283-296 },
  URL = { http://cvgmt.sns.it/paper/1464/ },
  note = { cvgmt preprint}
}