@article{lejpt32249,
 author={Khelifi, A. and Chettih Bentouati, S. a. B.},
 year={2018},
 title={A new hybrid algorithm of particle swarm optimizer with grey wolves’ optimizer for solving optimal power flow problem},
 journal={Leonardo Electron. J. Pract. Technol.},
 volume={17},
 number={32},
 pages={249-270},
 url={http://lejpt.academicdirect.org/A32/249_270.pdf}
}