@book{55105,
	author = {Haykin, Simon S.},
	title = {Introduction to analog and digital communications /},
	publisher = {Wiley India,},
	year = {2014.},
	address = {New Delhi :},
	edition = {2nd ed.},
	url = {www.loc.gov/catdir/toc/fy0607/2006276222.html}
}