1. S. Shovel, I Ulrich, J. Borenstien.Nav Belt and the Guide Cane, IEEE “Transactions on Robotics & Automation”. 2003; 10(1):9-20.
2. Mohd Helmy Abd Wahab, Amirul A. talib, Herdawatie A. Kadir, “Smart Cane: Assistive Cane for Visually-impaired People” IJCSI International Journal of Computer Science Issues, Vol. 8, Issue 4, No 2, 2011.
3. World Health Organization, “Visual Impairment and Blindness,” Fact sheet N “282”, Oct 2014.
4. L. Whitney,"Smart cane to help blind navigate", Available from: "http://news.cnet.com/8301-17938\_105-10302499-1.html", 2009.
5. R. Radhika, P.G. Pai, S. Rakshitha and R. Srinath “Implementation of Smart Stick for Obstacle Detection and Navigation.” International Journal of Latest Research in Engineering and Technology, vol. 2, number 5, pp. 45-50, 2016.