Choorat, S., Totanarungroj, K. and Muangman, N. (2008) “Assessment of Normal Subcarinal Angle on Chest Radiographs in Adult Thai Population”, Siriraj Medical Journal, 60(5), pp. 264–266. available at: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/246485 (accessed: 11 October 2026).