Hudiburgh L, Garbinsky D. Data visualization: bringing data to life in an introductory statistics course. J Stat Educ. 2020;28(3):262-79. doi: 10.1080/10691898.2020.1796399
Fleming AD, Xia X, McDicken WN, Sutherland GR, Fenn L. Myocardial velocity gradients detected by Doppler imaging. Br J Radiol. 1994 Jul 1;67(799):679-88. doi: 10.1259/0007-1285-67-799-679