B. Saragih, C. V., and S. Widyarto. “Face Recognition With Principal Component Analysis (PCA) Application Using Euclidean Distance Measurement”. Proceedings of the Informatics Conference, vol. 2, no. 2, Dec. 2020, pp. 1-4, https://ojs.journals.unisel.edu.my/index.php/icf/article/view/1.