@Misc{ 
  AmbMonSav13,
  author = { Ambrosio, Luigi and Mondino, Andrea and Savaré, Giuseppe },
  title = { On the Bakry-Èmery condition, the gradient estimates and the Local-to-Global property of $RCD^*(K,N)$ metric measure spaces },
  journal = { Journal of Geometric Analysis },
  year = { 2014 },
  doi = { 10.1007/s12220-014-9537-7 },
  pages = {  },
  URL = { http://cvgmt.sns.it/paper/2232/ },
  note = { cvgmt preprint}
}