In this paper we establish two-sided estimates for the density of the Feynman-Kac semigroups of stable-like processes with potentials given by signed measures belonging to the Kato class. We also provide similar estimates for the densities of two other kinds of Feynman-Kac semigroups of stable-like processes.
"Two-sided Estimates on the Density of the Feynman-Kac Semigroups of Stable-like Processes." Electron. J. Probab. 11 146 - 161, 2006. https://doi.org/10.1214/EJP.v11-308