'Back Matter' (Energy Engineering, 2020), 'Condition Monitoring of Rotating Electrical Machines', 3rd ed., Chap. bm, pp. -, DOI: 10.1049/PBPO145E_bm
IET Digital Library, https://digital-library.theiet.org/;jsessionid=9bou375tcs16.x-iet-live-01content/books/10.1049/pbpo145e_bm