@conference {30786,
	title = {Oil Shale upgrading by flotation},
	booktitle = {EPRI Conference },
	year = {2013},
	month = {10-12 Feb},
	address = {Cairo, Egypt},
	author = {S.E.El-Mofty and A.Al-Kammar and A.A.El-Midany and N.Khairy}
}
