Prasertchai, R., R. Saipanish, T. Hirunyatheb, S. Jullagate, W. Ketkeaw, and M. Lotrakul. “Depression in Obsessive-Compulsive Disorder Patients”. Journal of the Psychiatric Association of Thailand, vol. 60, no. 4, Jan. 2016, pp. 331-42, https://he01.tci-thaijo.org/index.php/JPAT/article/view/45629.