Ngo, M. T., Q. D. Pham, Q. D. Nguyen, D. D. Nguyen, and T. L. Nguyen. “Sensorless Speed Control of PMSM–Magnetic Bearing Using High-Gain Observer”. 2020. Journal of Measurement, Control, and Automation, vol. 1, no. 1, Nov. 2020, https://mca-journal.org/index.php/mca/article/view/4.