@book{4626,
	author = {Gupta, Prem Kumar and Hira, D. S.},
	title = {Problems in Operation Research: principles and solutions},
	publisher = {S Chand & Co Ltd,},
	year = {2010.},
	address = {[S.l.] :},
	url = {http://10.10.170.122:8080/browse/book/26587}
}