The functional central limit theorem for semimartingales taking values in a Hilbert space
V. V. Lavrent'ev

References
1.	R. Sh. Liptser, A. N. Shiryaev, “Funktsionalnaya tsentralnaya predelnaya teorema dlya semimartingalov”, Teoriya veroyatn. i ee primenenie, 25:4 (1980), 683–703
2.	M. Metivier, J. Pellaumail, Stochastic integration, Academic Press, New York, 1980
3.	H. Walk, “An invariance principle for the Robbins-Monro process in a Hilbert space”, Z. $W$-theorie, B39:2 (1977), 135–150