Kiawpanya, S., and P. Jarasrassamee. “Prevalence and Association of Somatic Symptoms with Depression Severity in Major Depressive Disorder Patients at Suanprung Psychiatric Hospital”. Academic Psychiatry and Psychology Journal, vol. 42, no. 1, Apr. 2026, pp. 30-44, https://he01.tci-thaijo.org/index.php/APPJ/article/view/284678.