TY - JOUR AU - Stefen Hui AU - Stanisław Żak TI - Observer design for systems with unknown inputs JO - International Journal of Applied Mathematics and Computer Science PY - 2005 SP - 431 VL - 15 IS - 4 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/IJAMCS_2005__15_4_207755/ LA - en ID - IJAMCS_2005__15_4_207755 ER -