1. Yu. N. Blagoveshchenskii and M. I. Freidlin, Diffusion processes depending on a small parameter, DAN SSSR, 138, No. 3 (1961).
2. I. V. Girsanov, On a transformation of a class of random processes by an absolutely continuous change of measure, Teoriya Veroyatn. i ee Primen., 5, No. 3 (1960), 314?330.
3. Yu. L. Daletskii, Continual integrals connected with evolutionary operator equations, UMN,17, No. 5 (1962), 3?115.
4. E. B. Dynkin, Markov Processes [in Russian], Moscow, Fizmatgiz (1963).
5. A. V. Skorokhod, Investigations in the Theory of Random Processes [in Russian], Kiev, Izd. Kiev Univ. (1961).