Vision Impairment and Blindness. (2018). World health organization. Retrieved 09 July, 2019 from http://www.who.int/news-room/fact-sheets/detail/blindness-and-visual-impairment
 Alech, A. (2010). Bangladesh fights to end blindness. Retrieved 09 July, 2019 from https://www.theguardian.com/world/2010/sep/28/bangladesh-volunteers-childhood-blindness-treatment
 Dastider, A., Basak, B., Safayatullah, M., Shahnaz, C., & Fattah, S. A. (2017, December). Cost efficient autonomous navigation system (e-cane) for visually impaired human beings. 2017 IEEE region 10 humanitarian technology conference (R10-HTC) (pp. 650-653). Dhaka, Bangladesh: IEEE.
 Uddin, M. A., & Suny, A. H. (2015, May). Shortest path finding and obstacle detection for visually impaired people using smart phone. 2015 international conference on electrical engineering and information communication technology (ICEEICT) (pp. 1-4). Jahangirnagar University, Dhaka-1324, Bangladesh: IEEE.
 Tanveer, M. S. R., Hashem, M. M. A., & Hossain, M. K. (2015). Android assistant EyeMate for blind and blind tracker. 2015 18th international conference on computer and information technology (ICCIT) (pp. 266-271). IEEE.
 Sabab, S. A., & Ashmafee, M. H. (2016, December). Blind reader: An intelligent assistant for blind. In 2016 19th International Conference on Computer and Information Technology (ICCIT) (pp. 229-234). North South University, Dhaka, Bangladesh: IEEE.
 Noman, A. T., Chowdhury, M. M., Rashid, H., Faisal, S. S. R., Ahmed, I. U., & Reza, S. T. (2017, December). Design and implementation of microcontroller based assistive robot for person with blind autism and visual impairment. 2017 20th international conference of computer and information technology (ICCIT) (pp. 1-5). IEEE.
 Sangami, A., Kavithra, M., Rubina, K., & Sivaprakasam, S. (2015). Obstacle detection and location finding for blind people. International journal of innovative research in computer and engineering, 3, 119-123.
 Munir, Hafiz MU, Fahad Mahmood, Ayesha Zeb, Fahad Mehmood, Umar S. Khan, and Javaid Iqbal. "The voice enabled stick." In Computer and Information Technology (ICCIT), 2017 20th International Conference of, pp. 1-5.
 Mekhalfi, M. L., Melgani, F., Zeggada, A., De Natale, F. G., Salem, M. A. M., & Khamis, A. (2016). Recovering the sight to blind people in indoor environments with smart technologies. Expert systems with applications, 46, 129-138.
 Parkinson, B. W., Enge, P., Axelrad, P., & Spilker Jr, J. J. (Eds.). (1996). Global positioning system: Theory and applications, Volume II. American Institute of Aeronautics and Astronautics.
 Yuan, D., & Manduchi, R. (2005, June). Dynamic environment exploration using a virtual white cane. 2005 IEEE computer society conference on computer vision and pattern recognition (CVPR'05) (Vol. 1, pp. 243-249). IEEE.
 Rovira-Más, F., & Banerjee, R. (2013). GPS data conditioning for enhancing reliability of automated off-road vehicles. Proceedings of the institution of mechanical engineers, part D: journal of automobile engineering, 227(4), 521-535.
 Badamasi, Y. A. (2014). The working principle of an Arduino. 2014 11th international conference on electronics, computer and computation (ICECCO) (pp. 1-4). IEEE.
 Mohammad, T. (2009). Using ultrasonic and infrared sensors for distance measurement. World academy of science, engineering and technology, 51, 293-299.
Bluetooth Module HC-05. (n.d.). Retrieved July 10, 2019 from https://wiki.eprolabs.com/index.php?title=Bluetooth_Module_HC-05.
Arduino Project Hub. (n.d.). Retrieved July 10, 2019 from https://create.arduino.cc/projecthub/rztronics/ultrasonic-range-detector-using-arduino-and-sr-04f-8a804d?ref=search&ref_id=Measuring Distance using Ultrasonic sensor lcdmonitor&offset=2
Understanding How Ultrasonic Sensors Work. (n.d.). Retrieved July 10, 2019 from https://www.maxbotix.com/articles/how-ultrasonic-sensors-work.htm
Complete Guide for Ultrasonic Sensor HC - SR04. (n.d.). Retrieved July 10, 2019 from https://randomnerdtutorials.com/complete-guide-for-ultrasonic-sensor-hc-sr04/
 Arefin, M. A., Mallik, A., & Asfaquzzaman, M. (2018). Renewable energy–assisted hybrid three-wheeler: A numerical investigation. Advances in mechanical engineering, 10(12), 1687814018814372.