%0 Journal Article %A A. V. Lyubimov %A E. V. Postnikov %T Optimal estimation of the state of a~discrete stochastic system with controllable observations %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1989 %P 51-60 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1989_11_a8/ %G ru %F IVM_1989_11_a8