ํyimcharoen sirilak, B. Srilawong, and P. Sao-dan. “Heart rate reduction during Coronary computed tomography angiography: A randomized comparison of metoprolol alone vs metoprolol plus ivabradine”. The Journal of Chulabhorn Royal Academy, vol. 7, no. 2, June 2025, pp. 157-66, https://he02.tci-thaijo.org/index.php/jcra/article/view/269995.