@book{6729,
	author = {Blumenfeld, Dennis.},
	title = {Operations Research Calculations Handbook, },
	publisher = {CRC Press,},
	year = {2009.},
	series = {Operations research series.},
	address = {New York},
	edition = {2nd ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/1420052403/chopaconline-2}
}