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3. V. B. Kolmanovskii and V. R. Nosov, Stability and Periodic Modes of Regular Systems with Aftereffects (Nauka, Moscow, 1981) [in Russian].
4. A. S. Klyuev and V. S. Karpov, Synthesis of High-Performance Controllers for Plants with Delay (Energoatomizdat, Moscow, 1990) [in Russian].
5. A. R. Gaiduk, “Synthesis of Robust Control Systems with Delay,” Avtom. Telemekh., No. 1 (1997).