Kim, Hyang Mi, Hyun Gon Seo, and Jin Young Min. “Development of Dementia Improvement Contents Using Sonic Vibrator”. International Journal of Advanced Science and Technology 28, no. 4 (September 27, 2019): 290 - 299. Accessed March 9, 2026. http://sersc.org/journals/index.php/IJAST/article/view/357.