@Article{ 
  Li15,
  author = { Li, Yi },
  title = { Li-Yau-Hamilton estimates and Bakry-Emery-Ricci curvature },
  journal = { Nonlinear Analysis: Theory, Methods & Applications },
  year = { 2015 },
  doi = { 10.1016/j.na.2014.09.014 },
  volume = { 113 },
  pages = { 1-32 },
  URL = { http://cvgmt.sns.it/paper/3280/ },
  note = { cvgmt preprint}
}