@article{RM_1991_46_3_a11,
     author = {B. V. Lazareva and R. Z. Khas'minskii},
     title = {A~simplified filtration procedure for a~partially observed {Markov} process},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {223--224},
     publisher = {mathdoc},
     volume = {46},
     number = {3},
     year = {1991},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1991_46_3_a11/}
}