@article{UFA_2011_3_2_a0,
     author = {E. M. Asadullin and F. S. Nasyrov},
     title = {About filtering problem of diffusion processes},
     journal = {Ufa mathematical journal},
     pages = {3--9},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/UFA_2011_3_2_a0/}
}