Benko Т.G., and V.S. Mamroha. “The Principle of Developing a Programmable Multi-Frequency Oscillator Based on CMOS Transistors in the LT SPICE Environment”. Physics and Chemistry of Solid State, vol. 26, no. 3, Sept. 2025, pp. 705-11, doi:10.15330/pcss.26.3.705-711.