%0 Journal Article %A Stefen Hui %A Stanisław Żak %T Observer design for systems with unknown inputs %J International Journal of Applied Mathematics and Computer Science %D 2005 %P 431 %V 15 %N 4 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/IJAMCS_2005__15_4_207755/ %G en %F IJAMCS_2005__15_4_207755