@article {81284,
	title = {CFD Investigation of Wing With Winglet up and Down Wards :Effect of Wing Aerodynamic Performance},
	journal = {Zagazig University Journal of Science \&Technology},
	volume = {25},
	year = {2015},
	pages = {50-62},
	author = {Essam E. Khalil and Eslam S Abdelghany and Osama E. Abdelatif and Gamal M ElHarriry}
}
