%0 Journal Article %A B. L. Rozovskii %A A. N. Shiryaev %T On infinite order systems of stochastic differential equations arising in the theory of optimal non-linear filtering %J Teoriâ veroâtnostej i ee primeneniâ %D 1972 %P 228-237 %V 17 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TVP_1972_17_2_a1/ %G ru %F TVP_1972_17_2_a1