Mohd Shah, Muhammad Shakir Fahmi, and Nik Mohd Asri Nik Ismail. “Microcontroller Based Obstacle Detection and Location Tracker Using Smart Stick System for Visual Impairment People”. Evolution in Electrical and Electronic Engineering 4, no. 1 (May 3, 2023): 305–313. Accessed June 22, 2024. https://publisher.uthm.edu.my/periodicals/index.php/eeee/article/view/10756.