citation journal title = Diseases of the Colon amp Rectum citation issn = 00123706 citation volume = 10 citation issue = 2 citation doi = 101007/BF02617360 citation firstpage = 129 citation lastpage = 135 citation publication date = 1967/03/01 citation title = Massive hemorrhage from colonic diverticula caused by arterial erosion A practical theory of its mechanism and causation