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2. Irreducible Realizations and the Degree of a Rational Matrix;Kalman;Jour. SIAM,1965
3. The Synthesis of Linear Dynamical Systems from Prescribed Weighting Patterns;Youla;Polytechnic Inst. Brooklyn, Rep. PIBMRI-1271-65,1965
4. Effective Construction of Linear State-Variable Models from Input/Output Data;Ho,1965
5. A Canonical Simulation of a Transfer Function Matrix;Anderson;IEEE Trans. on Automatic Control,1966