1. Agrachev, A., Lee, P.: Generalized Ricci curvature bounds for three dimensional contact sub-Riemannian manifolds, Arxiv preprint (2009). http://arxiv.org/pdf/0903.2550.pdf
2. Ambrosio, L., Tilli, P.: Topics on analysis in metric spaces. In: Oxford Lecture Series in Mathematics and its Applications, vol. 25. Oxford University Press, Oxford (2004)
3. Bakry, D.: Un critère de non-explosion pour certaines diffusions sur une variété riemannienne complète. C. R. Acad. Sci. Paris Sér. I. Math. 303(1), 23–26 (1986)
4. Bakry, D.: L’hypercontractivité et son utilisation en théorie des semigroupes. Ecole d’Eté de Probabilites de St-Flour. In: Lecture Notes in Math. Springer, Berlin (1994)
5. Bakry, D.: Functional inequalities for Markov semigroups. Probability measures on groups: recent directions and trends, pp. 91–147. Tata Inst. Fund. Res., Mumbai (2006)