?url_ver=Z39.88-2004&rft_id=10.1109%2FCDC.1993.325517&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Khapalov%2C+A.&rft.aulast=Khapalov&rft.aufirst=A.&rft.date=December+1993&rft.atitle=Exact+observability+of+nonstationary+hyperbolic+system+with+scanning+finite-dimensional+observations&rft.title=Proceedings+of+the+32nd+IEEE+Conference+on+Decision+and+Control%2C+1993.&rft.pages=1866-1867&rft.genre=article