1) Lj. T. Grujic and D.D. Silijak: Exponential Stability of Large-Scale Discrete System, Int. J. Control, 19-3, 481/491 (1974)
2) A.N. Michel: Stability Analysis of Interconnected Systems, SIAM J. Control, 12, 554/579 (1974)
3) M. Araki: Application of M-matrix to the Stability Problems of Composite Dynamical Systems, J. Math. Anal., 52, 309/321 (1975)
4) G. Bitsoris and C. Burgat: Stability Analysis of Complex Discrete Systems with Locally and Globally Stable Subsystems, Int. J. Control, 25-3, 413/424 (1977)
5) S. Weissenberger: Stability Regions of Large-Scale Systems, Automatika, 9-6, 653/663 (1973)