@book{4564,
	author = {Tiwari, N.K. and Shandilya, Shishir K.},
	title = {Operations research /},
	publisher = {Prentice-Hall of India Pvt.Ltd,},
	year = {2006.},
	address = {[S.l.] :},
	url = {http://www.amazon.com/exec/obidos/ASIN/812032966X/chopaconline-20}
}