@book{33,
	author = {"Davis,william S"},
	title = {operating systems},
	publisher = {Pearson Education Publisher},
	year = {1992},
	address = {California},
	edition = {4th},
	url = {https://libgen.is/book/index.php?md5=26069E55B8CCD272BAA5107DFF5FA285}
}