Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) COLAN SD.,Left ventricular end-systolic wall stress-velocity of fiber shortening relation : A load-independent index of myocardinal contractility,J Am Coll Cardiol,,,1984,4,,715-724,https://cir.nii.ac.jp/crid/1571135649648814720,