Moturi Mounika,Dr. Srinivas Bachu. “Development Of Secure And Efficient Outsourcing By Using Principal Component Analysis (PCA)-Based Image Recognition”. International Journal of Advanced Science and Technology, Vol. 29, no. 12s, May 2020, pp. 1319 -27, http://sersc.org/journals/index.php/IJAST/article/view/22625.