@Article{ 
  Li12,
  author = { Li, Yi },
  title = { Generalized Ricci flow I: Higher-derivative estimates for compact manifolds },
  journal = { Analysis &PDE },
  year = { 2012 },
  doi = { 10.2140/apde.2012.5.747  },
  volume = { 5 },
  number = { 4 },
  pages = { 747-775 },
  URL = { http://cvgmt.sns.it/paper/3286/ },
  note = { cvgmt preprint}
}