'Frequency-adaptive periodic control of power converters' (Energy Engineering, 2016), 'Periodic Control of Power Electronic Converters', Chap. 6, pp. 181-213, DOI: 10.1049/PBPO082E_ch6
IET Digital Library, https://digital-library.theiet.org/;jsessionid=bk4c6tpf14a0.x-iet-live-01content/books/10.1049/pbpo082e_ch6