@Article{ 
  DeL18b,
  author = { De Lellis, Camillo },
  title = { The Onsager Theorem },
  journal = { Surveys in Differential Geometry 2017. },
  year = { 2018 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/4098/ },
  note = { cvgmt preprint}
}