@Article{ 
  ChiDeLKre13a,
  author = { Chiodaroli, Elisabetta and De Lellis, Camillo and Kreml, Ondrej },
  title = { Surprising solutions to the isentropic system of gas dynamics },
  journal = { Proceedings of HYP2012 },
  year = { 2014 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2179/ },
  note = { cvgmt preprint}
}