Hsu, John S.; Burress, Timothy A.; Lee, Seong T.; Wiles, Randy H.; Coomer, Chester; McKeever, John W. et al. 16,000-RPM Interior Permanent Magnet Reluctance Machine with Brushless Field Excitation, report, October 1, 2007; (https://digital.library.unt.edu/ark:/67531/metadc902781/m1/1/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .