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3. B. T. Polyak and P. S. Shcherbakov, Robust Stability and Control (Nauka, Moscow, 2002) [in Russian].
4. D. V. Balandin and M. M. Kogan, Synthesis of Control Laws on Basis of Linear Matrix Inequalities (Nauka, Moscow, 2007) [in Russian].
5. I. V. Vostrikov, A. N. Dar’in, and A. B. Kurzhanskii, “On the damping of a ladder-type vibration system subjected to uncertain perturbations,” Differ. Equations 42, 1524 (2006).