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2. V. I. Arnold and Yu. S. Ilyashenko, “Ordinary differential equations,” in: Dynamical Systems-1, Itogi Nauki i Tekhniki, Sovremennye Problemy Matematiki, Fundamental’nye Napravleniya, vol. 1, VINITI, Moscow, 1985, 7–140; English transl.: in: Dynamical Systems I, Encyclopaedia Math. Sci. (1988), 1–148.
3. V. M. Buchstaber, O. V. Karpov, and S. I. Tertychnyi, “A system on a torus modelling the dynamics of a Josephson junction,” Uspekhi Mat. Nauk, 67:1(403) (2012), 181–182; English transl.: Russian Math. Surveys, 67:1 (2012), 178–180.
4. V. M. Buchstaber, O. V. Karpov, and S. I. Tertychnyi, “Rotation number quantization effect,” Teoret. Mat. Fiz., 162:2 (2010), 254–265; English transl.: Theor. Math. Phys., 162:2 (2010), 211–222.
5. V.M. Buchstaber, O. V. Karpov, and S. I. Tertychnyi, “Peculiarities of dynamics of a Josephson junction shifted by a sinusoidal SHF current,” Radiotekhnika i Elektronika, 51:6 (2006), 757–762.