Jan Kisyński. On resolvents and semigroups associated with the Dirichlet problem for an elliptic differential operator of second order with a Lévy perturbation, Lublin University of Technology, Lublin, Poland, 1998.

Keywords: resolvent (submarkovian, regular, Ray); one-parameter semigroup of linear operators (strongly continuous, holomorphic, Feller, Ray); elliptic PDO of the second order; integrodifferential operator of Lévy; operators of Green; harmonic operators; Sobolev space; principle of the positive maximum.