1. “Linear System Theory; The State Space Approach”;ZADEH,1963
2. “Optimal Control; An Introduction to the Theory and its Applications”;ATHANS,1966
3. “State Variables for Engineers”;DERUSSO,1967
4. “State Space Analysis of Control Systems”;OGATA,1967
5. C.D. JOHNSON, “Optimal Control of the Disturbed Linear Regulator”, in Final Report, Contract NAS8-18008, Convair Division of General Dynamics, Huntsville Operations, GDC Rpt. No. DDF67-003, Chapter 3, 1967.