@Misc{ 
  MarVal11,
  author = { Mari, Luciano and Valtorta, Daniele },
  title = { On the equivalence of stochastic completeness, Liouville and  Khas'minskii condition in linear and nonlinear setting },
  journal = { Trans. Amer. Math. Soc. },
  year = { 2013 },
  doi = { 10.1090/S0002-9947-2013-05765-0 },
  volume = { 365 },
  number = { 9 },
  pages = { 4699-4727 },
  URL = { http://cvgmt.sns.it/paper/4979/ },
  note = { cvgmt preprint}
}