@book{35,
	author = {Oppenheim, Alan V  and  Schafer, Ronald W},
	title = {Digital Signal Processing},
	publisher = {Pearson Education},
	year = {2015,c2015},
	address = { New Delhi},
	note = {An up-to-date and detailed introduction to the fundamentals of processing signals by digital techniques and their applications to practical problems.}
}