@book{25457,
	author = {Sharma, Sanjay},
	title = {Communication systems},
	publisher = {S.K Kataria & Sons},
	year = {2011},
	address = {New Delhi},
	url = {https://libgen.is/book/index.php?md5=3AA2ABF20D8B073C5FBE20935DE5A35A}
}