1. Blumenthal, R., and R. Getoor: Markov processes and potential theory. New York: Academic Press 1968.
2. Cartier, P., P. A. Meyer et M. Weil: Le retournement du temps. Séminaire de Probabilités I, Université de Strasbourg. Lecture Notes in Mathematics. Berlin-Heidelberg-New York: Springer 1967.
3. Kunita, H., and S. Watanabe: Markov processes and Martin boundaries. Illinois J. Math. 9, 485?526 (1965).
4. ? ?: On certain reversed processes and their applications to potential theory and boundary theory. J. Math. Mech. 15, 393?419 (1966).
5. Meyer, P. A.: Probabilités et potentiel. Paris: Hermann; New York: Blaisdell 1966.