@article{lejpt20159,
 author={Ben Hamed, M. and Sbita, L.},
 year={2012},
 title={Digital Phase Locked Loop Induction Motor Speed Controller: Design and Experiments},
 journal={Leonardo Electron. J. Pract. Technol.},
 volume={11},
 number={20},
 pages={159-174},
 url={http://lejpt.academicdirect.org/A20/159_174.pdf}
}