1. Hörmander, L. (1967). Hypoelliptic second order differential equations,Acta Math. 119, 147–171.
2. Ikeda, N., and Watanabe, S. (1989).Stochastic Differential Equations and Diffusion Processes, Second edition, North-Holland Kodansha.
3. Kunita, H. (1970). Stochastic integrals based on martingales taking values in Hilbert space,Nagoya Math. J. 38, 41–52.
4. Kunita, H. (1990).Stochastic Flows and Stochastic Differential Equations, Cambridge University Press.
5. Kusuoka, S., and Stroock, D. W. (1985). Applications of the Malliavin calculus, Part II,J. Fac. Sci. University Tokyo Sect. IA, Math. 32, 1–76.