@book{66591,
	author = {Oppenheim, A.V and Willsky, Alan S.},
	title = {Signals and Systems  },
	publisher = {Pearson Education,},
	year = {2018.},
	address = {New Delhi:},
	edition = {2nd edition.},
	url = {http://10.10.170.122:8080/browse/book/22877}
}