@Misc{ 
  FigRosSer21,
  author = { Figalli, Alessio and Ros-Oton, Xavier and Serra, Joaquim },
  title = { The singular set in the Stefan problem },
  journal = { J. Amer. Math. Soc },
  year = { 2023 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5082/ },
  note = { cvgmt preprint}
}