@article {el2016optimized,
	title = {Optimized hierarchical routing technique for wireless sensors networks},
	journal = {Soft Computing},
	volume = {20},
	number = {11},
	year = {2016},
	note = {n/a},
	pages = {4549{\textendash}4564},
	publisher = {Springer Berlin Heidelberg},
	abstract = {n/a},
	author = {Shaimaa Ahmed El-Said and Asmaa Osamaa, and Aboul Ella Hassanien}
}
