@Misc{ 
  AlaNGU21,
  author = { Alazard, Thomas and Nguyen, Quoc-Hung },
  title = { On the Cauchy problem for the Muskat equation. II: Critical initial data },
  journal = { Annals of PDE },
  year = { 2021 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/5039/ },
  note = { cvgmt preprint}
}