Sivaprasad, V., Kannan, K., Rajakumar, M. P., Sivaperumal, K., Thiagarajan, R. and Manikandan, T. (2022) “Robust periocular recognition in training of CNN models using HOG- based gradient approach”, International journal of health sciences, 6(S6), pp. 8506–8512. doi: 10.53730/ijhs.v6nS6.11833.