Emad A. Mohammed, and Haitham L. Saadon. “Secure Optical Identity Tag With Quick Response Code Based on Sparse Phase Information”. University of Thi-Qar Journal of Science, Vol. 7, no. 2, Dec. 2020, pp. 126-30, https://www.jsci.utq.edu.iq/index.php/main/article/view/729.