1. G. I. Atabekov, S. D. Kupalyan, A. B. Timofeev, S. S. Khukhrikov, Theoretical foundations of electrical engineering (Energiya, Moscow, 1979), pp. 432.
2. Controlled switching circuits based on non-linear resistive elements
3. L. A. Bessonov, Non-linear electrical circuits (Higher school, Moscow, 1977), pp. 343.
4. Non-contact voltage relay for switching windings of a boost transformer
5. Study of the state of the issue of increasing the quality of electric energy in the power supply systems