R. Krishnan and R. Ghosh, “Staring Algorithm and Performance of A PMDC Brushless Motor Drive System with No Position Sensor,” 20th Annual IEEE Power Electronics Specialists Conference, Milwaukee, Vol. 2, June 1989, pp. 815-821.
 J. Holtz, “State of the Art of Controlled AC Drive without Speed Sensor,” IEEE Proceedings of the 1995 International Conference on Power Electronics and Drive Systems, Vol. 1, February 1995, pp. 1-6.
 T. H. Kim, H. W. Lee, and M. Ehsani, “State of the Art and Future Trends in Position Sensorless Brushless DC Motor/Generator Drives,” 31st Annual Conference of IEEE Industrial Electronics Society, Michigan, November 2005, pp. 1718-1725.
 P. P. Acarnley and J. F. Watson, “Review of Position- sensorless Operation of Brushless Permanent-magnet Machines,” IEEE Transactions on Industrial Electronics, Vol. 53, No. 2, April 2006, pp. 352-362.
 J. Shao, “An Improved Microcontroller-Based Sensorless Brushless DC (BLDC) Motor Drive for Automotive Applications,” IEEE Transactions on Industry Applications, Vol. 42, No. 5, 2006, pp. 1216-1231.