References
- Bellman , R and Cooke , KL . 1963 . Differential Difference Equations , New York : Academic Press .
- Kharitonov , VL and Zhabko , AP . 2003 . Lyapunov Krasovskii approach to the robust stability analysis of time delay systems . Automatica , 39 : 15 – 20 .
- Kharitonov , VL . 2005 . Lyapunov functionals and Lyapunov matrices for neutral type time delay systems: a single delay case . Int. J. Cont. , 78 : 783 – 800 .
- Kharitonov , VL . 2006 . Lyapunov matrices for a class of time delay systems . Sys. Cont. Lett. , 55 : 610 – 617 .
- Louisell , J . 2001 . A matrix method for determining the imaginary axis eigenvalues of a delay system . IEEE Trans. Automa. Cont. , 46 : 2008 – 2012 .