@book{6284,
	author = {Cha,D.Philip},
	title = {Fundamentals of signals and systems},
	publisher = {Cambridge University Press},
	year = {2007},
	address = {New york},
	url = {https://libgen.is/book/index.php?md5=9804C97FA5711DFB7FAFB3F5825CB8DB}
}