1. Barlow, M.T., Perkins, E.A.: Symmetric Markov chains in Z
d
: how fast can they move? Probab. Th. Rel. Fields 82, 95–108 (1989)
2. Davies. E.B.: Heat kernel bounds, conservation of probability and the Feller property. J. Anal. Math. 58, 99–119, (1992)
3. Grigor'yan, A.: On stochastically complete manifolds (Russian). Dokl. Akad. Nauk SSSR 290, no. 3, 534–537 (1986); English transl.: Sov. Math., Dokl. 34, no. 2, 310–313 (1987)
4. Grigor'yan, A.: The heat equation on noncompact Riemannian manifolds (Russian). Mat. Sb. 182, no. 1, 55–87 (1991); English transl.: Math. USSR—Sb. 72, no. 1, 47–77 (1992)
5. Grigor'yan, A.: Heat kernel upper bounds on a complete noncompact manifold. Rev. Mat. Iberoam. 10, no. 2, 395–452 (1994)