1. Lin, Y.: On periodic linked time systems. Int. J. Systems Sci. 19, 1299–1310 (1988)
2. Lin, Y.: General Systems Theory: A Mathematical Approach. Kluwer Academic and Plenum Publishers, New York (1999)
3. Ma, Y.H., Lin, Y.: Some properties of linked time systems. Int. J. General Systems 13, 125–134 (1987)
4. Mesarovic, M.D., Takahara, Y.: General Systems Theory: Mathematical Foundations. Academic Press, New York (1975)
5. Rugh, W.J.: Nonlinear Systems Theory: The Volterra/Wiener Approach. Johns Hopkins University Press, Baltimore (1981)