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2. Lecture Notes in Math;P.L. Butzer,1975
3. H. Cartan, Elementary Theory of Analytic Functions of One or Several Complex Variables. Addison-Wesley Publ. Co. Inc., Reading, Mass., 1963.
4. K.L. Chung, A Course in Probability Theory. Academic Press, New York-San Francisco-London, 1974.
5. A. Friedman, Stochastic Differential Equations and Applications Vol. 1. Academic Press, New York-San Francisco-London, 1974.