%0 Journal Article %A Twardowska, K. %A Marnik, T. %A Pasławska-Południak, M. %T Approximation of the Zakai Equation in a Nonlinear Filtering Problem With Delay %J International Journal of Applied Mathematics and Computer Science %D 2003 %P 151-160 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/IJAMCS_2003_13_2_a2/ %G en %F IJAMCS_2003_13_2_a2