Pongsaksri, M., N. Satiansukpong, and D. Sasat. “The Changes in persons with Autistic spectrum disorders after receiving the artificial elephant-assisted therapy program”. Academic Psychiatry and Psychology Journal, vol. 33, no. 3, Dec. 2017, pp. 222-37, https://he01.tci-thaijo.org/index.php/APPJ/article/view/75140.