'Class E Power Amplifiers' (Electromagnetic Waves, 2001), 'RF Power Amplifiers', Chap. 4, pp. 215-301, DOI: 10.1049/SBEW030E_ch4
IET Digital Library, https://digital-library.theiet.org/;jsessionid=29ql68qpnvv4l.x-iet-live-01content/books/10.1049/sbew030e_ch4