1. B. T. Polyak and P. S. Shcherbakov, Robust Stability and Control (Nauka, Moscow, 2002) [in Russian].
2. F. R. Gantmacher, The Theory of Matrices (Chelsea, New York, 1959; Fizmatgiz, Moscow, 1967).
3. V. V. Dikusar, G. A. Zelenkov, and N. V. Zubov, Methods for Robust Stability and Instability Analysis (Vychisl. Tsentr, Ross. Akad. Nauk, Moscow, 2007) [in Russian].