@Article{ 
  ZhuLi14,
  author = { Li, Yi and Zhu, Xiaorui },
  title = { Li-Yau estimates for a nonlinear parabolic equation on manifolds },
  journal = { Mathematical Physics, Analysis and Geometry },
  year = { 2014 },
  doi = { 10.1007/s11040-014-9155-4 },
  volume = { 17 },
  number = { 3-4 },
  pages = { 273-288 },
  URL = { http://cvgmt.sns.it/paper/3281/ },
  note = { cvgmt preprint}
}