Ida, Nathan: 'Implementation and testing' (Control, Robotics and Sensors, 2018), 'Open Resonator Microwave Sensor Systems for Industrial Gauging: A practical design approach', Chap. 7, pp. 263-284, DOI: 10.1049/PBCE103E_ch7
IET Digital Library, https://digital-library.theiet.org/;jsessionid=6evfm028hav2.x-iet-live-01content/books/10.1049/pbce103e_ch7