Takagi, M., Tsuchiya, Y., Nakaya, Y., Inoue, K., Kato, K., & Fujita, Y. (2025). Sleep Measurement and Health Management Using Fitness Trackers for Elderly People Living Alone. Advances in Social Sciences Research Journal, 12(10), 27–36. https://doi.org/10.14738/assrj.1210.19450