Olyverdi, Reza, and Isnaini Isnaini. “The Effect of Diaphragmatic Breathing Exercise on Reducing Insomnia in the Elderly”. Journal of Current Health Sciences 3, no. 2 (November 20, 2023): 63–68. Accessed June 4, 2026. https://www.ukinstitute.org/journals/2/jchs/article/view/48.