Smith, Katherine A., Leming Zhou, and Valerie J.M. Watzlaf. “User Authentication in Smartphones for Telehealth”. International Journal of Telerehabilitation 9, no. 2 (November 20, 2017): 3–12. Accessed March 22, 2026. https://telerehab.hpu.edu/index.php/Telerehab/article/view/6226.