Bhudhisawasdi, V., T. Ultaravichien, and S. Prathani. “Observation on Acute Acalculous Cholecystitis”. Srinagarind Medical Journal, vol. 2, no. 4, Nov. 2013, pp. 235-41, https://li01.tci-thaijo.org/index.php/SRIMEDJ/article/view/13424.