R.Deepan, S.Ramya, S.Praveen Raj, and V.Manimaran. “Human Computer Interaction for Visually Impaired People”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 6, no. 2, Mar. 2018, pp. 1748-52, doi:10.61096/ijiarec.v6.iss2.2018.1748-1752.