TY  - RPRT
TI  - The study of left ventricular function from digitized echocardiograms.
AU  - M T Upton
AU  - D G Gibson
DO  - 10.1016/0033-0620(78)90003-8
UR  - https://pubmed.ncbi.nlm.nih.gov/635214/
ID  - 635214
ER  -