@book{27813,
	author = {Taha, Hamdy A},
	title = {Operations research},
	publisher = {Excel books},
	address = {India},
	edition = {6TH},
	url = {https://libgen.is/book/index.php?md5=9FD4DCDC1C7DB6CAB9774B7AC6DF1633}
}