1. V. V. Shakhgil’dyan and A. A. Lyakhovkin, Phase-Locked Loops (Svyaz’, Moscow, 1972) [in Russian].
2. B. I. Shakhtarin, Yu. A. Sidorkina, and T. G. Aslanov, Nauchn. Vestn. Mosk. Gos. Tekh. Univ. Grazhdan. Aviats. 222 (12), 59–66 (2015).
3. G. Leonov, N. Kuznetsov, M. Yuldashev, et al., IEEE Trans. Circuits Syst. I: Regular Pap. 62 (10), 2454–2464 (2015). https://doi.org/10.1109/TCSI.2015.2476295
4. N. N. Krasovskii, Some Problems in the Theory of Motion Stability (Fizmatlit, Moscow, 1959) [in Russian].
5. V. M. Matrosov, The Method of Vector Lyapunov Functions: Analysis of Dynamical Properties of Nonlinear Systems (Fizmatlit, Moscow, 2001) [in Russian].