@book{106825,
	author = {Li, Gang, and Chang, Liping, and Tsinghua University Press.},
	title = {Signals and systems :},
	publisher = {De Gruyter,},
	year = {[2015]},
	series = {De Gruyter Textbook},
	address = {Berlin/Boston :},
	url = {https://app.knovel.com/hotlink/toc/id:kpSSF00001/signals-systems-fundamentals/signals-systems-fundamentals}
}