Design of observers for descriptor systems affected by unknown inputs. - Besma Gaddouna; Stéphane Giuliani; José Ragot (Int. J. Syst. Sci., 1996)

A unifying approach of LTI discrete-time state observers by means of complementary matrices. - Stéphane Ploix; Stéphane Giuliani; José Ragot (IEEE Trans. Autom. Control., 1999)