@conference {67186,
	title = {Shift work and occupational accidents},
	booktitle = { Health and Safety, IAPA},
	year = {2009},
	month = {20 April},
	address = {Toronto, Canada},
	author = {Zakaria A Yehia and El Attar M Samir and Siha S Mona and Farahat A Sahar}
}
