Kannan, Ramani; Ali, Jagabar Sathik: 'Power quality definitions' (Energy Engineering, 2017), 'Power Quality in Future Electrical Power Systems', Chap. 1, pp. 1-27, DOI: 10.1049/PBPO092E_ch1 IET Digital Library, https://digital-library.theiet.org/;jsessionid=f4j4jdceafmca.x-iet-live-01content/books/10.1049/pbpo092e_ch1