Grigoryan A, Hu E, Hu J. Lower estimates of heat kernels for non-local Dirichlet forms on metric measure spaces. JOURNAL OF FUNCTIONAL ANALYSIS. 2017;272(8):3311-3346.We are concerned with heat kernel estimates for a non local Dirichlet form on an Ahlfors regular metric measure space. We use an analytic approach to obtain the full lower stable-like estimate of the heat kernel from the near diagonal lower estimate. Combining with other known results, we obtain certain equivalent conditions for two-sided stable-like estimates of the heat kernel. The results can be simplified in certain cases, for example, when the Dirichlet form admits an effective resistance. (C) 2017 Elsevier Inc. All rights reserved