“Efficient Biometric Authentication Technique Using the Gray scale Information’s of Sclera, Iris and Pupil”, TURCOMAT, vol. 12, no. 7, pp. 2386–2403, Apr. 2021, Accessed: May 31, 2026. [Online]. Available: https://www.turcomat.org/index.php/turkbilmat/article/view/3451