Khan, Muhammad Imran, Azhar Imran, Abdul Haleem Butt, and Ateeq Ur Rehman Butt. 2021. “Activity Detection of Elderly People Using Smartphone Accelerometer and Machine Learning Methods”. International Journal of Innovations in Science & Technology 3 (4):186-97. https://journal.50sea.com/index.php/IJIST/article/view/96.