@book{2011,
	author = {Ahmed Abdelrazik Abdelzaher and Ahmed Yehia , },
	title = {Effects of dual - chamber pacing with short atrioventricular - delay in dilated cardiomyopathy / },
	publisher = {Ahmed AbdElrazik Abdelzaher , },
	year = {2002},
	address = {Cairo : },
	url = {http://172.23.153.220/th.pdf}
}