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2. An optimal linear system approach to load frequency control;Cavin;IEEE Trans,1971
3. Linear regulator design for a load and frequency control theory;Calovic;IEEE Trans,1972
4. Multilevel load-frequency control of interconnected power systems;Bengiamin;IEE Proc C Gen, Trans Distrib,1978
5. Automatic generation control of interconnected power systems using variable-structure controller;Chan;IEE Proc C Gen Trans Distrib,1981