1. The natural topology and excessive functions connected with a Markov process;Dynkin, E. B.;Dokl. Akad. Nauk SSSR,1959
2. Markoff processes and potentials. I, II;Hunt, G. A.;Illinois J. Math.,1957
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5. Continuous additive functionals of Markov processes and excessive functions;Šur, M. G.;Soviet Math. Dokl.,1961