@book{15570,
	author = {Hsu, Hwei P., },
	title = {Schaum's outline of signals and systems / },
	publisher = {McGraw Hill Education,},
	year = { 2020.},
	series = {Schaum's outline series.},
	address = {New Delhi : },
	edition = {4th edition.},
	note = {Includes index.}
}