?url_ver=Z39.88-2004&rft_id=10.1080%2F17442508808833485&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Kurzhanski%2C+A.&rft.aulast=Kurzhanski&rft.aufirst=A.&rft.issue=2&rft.volume=23&rft.date=1988&rft.issn=0090-9491&rft.atitle=On+stochastic+filtering+approximations+of+estimation+problems+for+systems+with+uncertainty%E2%88%97&rft.title=Stochastics&rft.pages=109-130&rft.genre=article