1. Liberzon, D., Switching in Systems and Control, Boston: Birkhäuser, 2003.
2. Fradkov, A., Early Ideas of the Absolute Stability Theory, Proc. European Control Conf., St. Petersburg, Russia, May 12–15, 2020, pp. 762–768.
3. Polyak, B.T., Khlebnikov, M.V., and Shcherbakov, P.S., Linear Matrix Inequalities in Control Systems with Uncertainty, Autom. Remote Control., 2021, vol. 82, no. 1, pp. 1–40.
4. Yakubovich, V.A., Frequency Conditions for the Absolute Stability of Control Systems with Several Nonlinear or Linear Nonstationary Blocks, Autom. Remote Control, 1967, vol. 28, no. 6, part 1, pp. 857–880.
5. Yakubovich, V.A., Absolute Instability of Nonlinear Control Systems. II, Autom. Remote Control, 1971, vol. 32, no. 6, part 1, pp. 876–884.