Bhudhisawasdi, V., and C. Pairojkul. “The Unusual Cases of Massivs Upper Gastrointestinal Haemorrhags : A Report of Two Cases”. Srinagarind Medical Journal, vol. 3, no. 1, Nov. 2013, pp. 57-62, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13441.