K. S. Haran, S. Kalsi, T. Arndt, H. Karmaker, R. Badcock, B. Buckley, T. Haugan, M.
Izumu, D. Loder, J. W. Bray, P. Masson, E. W. Stautner, Nov. 2017, High power density
superconducting rotating machines — development status and technology roadmap, Supercond.
Sci. Technol., Vol. 30, No. 12
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