Sammaiah S, Dr. K. Venugopal Rao. “A Fine Grained Survey over the Recognition of Face and Face Expressions: Databases, And Methods”. International Journal of Advanced Science and Technology, Vol. 29, no. 8s, Apr. 2020, pp. 1821 -38, http://sersc.org/journals/index.php/IJAST/article/view/12744.