@article {3858,
	title = {Optimal Coordination of Directional Overcurrent Relays Using Hybrid BFOA-PSO Optimization Algorithm},
	journal = {Electrotehnica, Electronica, Automatica },
	volume = {63},
	number = {2},
	year = {2015},
	pages = {116-125},
	author = {H.A. Hassan and M. Zellagui}
}
