Correlation of coronary calcification and angiographically documented stenoses in patients with suspected coronary artery disease: results of 1764 patients. - Haberl,R.; Becker,A.; Leber,A.; Knez,A.; Becker,C.; Lang,C.; Bruning,R.; Reiser,M.; Steinbeck,G. (J Am Coll Cardiol, 2002)