Kaewfoongrungsi, P., and D. Hormdee. “Support Vector Regression-Based Synthesis of 12-Lead ECG System from the Standard 5 Electrode System Using Lead V1”. Engineering and Applied Science Research, vol. 43, Nov. 2016, pp. 494-8, https://ph01.tci-thaijo.org/index.php/easr/article/view/70905.