State space representation for arbitrary orthogonal rational functions. - Patrick Van Gucht; Adhemar Bultheel (Syst. Control. Lett., 2003)

Orthogonal rational functions for system identification: numerical aspects. - Patrick Van Gucht; Adhemar Bultheel (IEEE Trans. Autom. Control., 2003)

Orthogonal Rational Functions with real coefficients and semiseparable matrices. - Adhemar Bultheel; Patrick Van Gucht; Marc Van Barel (J. Comput. Appl. Math., 2010)