@book{14365,
	author = {Johnsonbaugh, Richard},
	title = {Discrete mathematics},
	publisher = {Pearson Education Publisher},
	year = {2014},
	address = {New Dehli},
	edition = {7th},
	url = {https://libgen.is/book/index.php?md5=9240D0BBF008A70160C5A586F74C2B62}
}