Ashish Wanode, Pranay Shete, and Bharati Masram. “Ultrasonic Sensor Based Smart Stick For Visually Impaired Person Along With SOS Button”. Engineering Research Transcripts 2 (March 26, 2023): 61–70. Accessed September 16, 2024. https://grinrey.com/journals/index.php/ert/article/view/49.