[1] LEE CHIEN-HUA.New Results for the Bounds of the Solution for the Continuous Riccati and Lyapunov Equations [J].IEEE Trans.Automat. Contr.,1997,42:118-123.[2] LEE C H.Eigenvalue Upper and Lower Bounds of the Solution for the Continuous Algebraic Matrix Ricatti Equation [J].IEEE Trans. Automat. Contr.,1996,43:683-686.[3] 张端金,杨成梧.反馈控制系统Delta算子理论的研究与发展 [J].控制理论与应用,1998,15(2):153-160.[4] LEE C H.Solution Bounds of the Continuous and Discrete Lyapunov Matrix Equations [J].Journal of Optimization Theory and Application,2004,120:559-578.[5] 张端金,杨苹,吴捷.基于Delta算子的统一代数Lyapunov方程解的上下界 [J].控制理论与应用,2004,21(1):94-96.