@book{8808,
	author = {Timmons, Daniel L. and Johnson, Catherine W.,},
	title = {Fundamentals of algebraic modeling :},
	publisher = {Brooks/Cole,},
	year = {2010.},
	address = {Belmont, Calif;},
	edition = {5th ed.:},
	url = {http://www.loc.gov/catdir/enhancements/fy1303/2008938520-b.html}
}