Wyns, W., Melin, J., Vanbutsele, RJ., Decoster, PM., Steels, M., Piret, L., & Detry, JMR. (1982). Assessment of Right and Left-ventricular Volumes During Upright Exercise in Normal Men. European Heart Journal (English Edition), 3(6), 529-536. https://hdl.handle.net/2078.5/87615 (Original work published 1982)