El-Refaie, Ayman; Raminosoa, Tsarafidy; Reddy, Patel; Galioto, Steven; Pan, Di; Grace, Kevin; Alexander, James; Huh, Kum-Kang: 'Comparison of traction motors that reduce or eliminate rare-earth materials', IET Electrical Systems in Transportation, 2017, 7, (3), p. 207-214, DOI: 10.1049/iet-est.2016.0068
IET Digital Library, https://digital-library.theiet.org/;jsessionid=am9p44m6sdjkm.x-iet-live-01content/journals/10.1049/iet-est.2016.0068