Azizan, A., A. Hamzah, and K. Johari. “The Implementation of QR Codes for Aircraft Disassemble Part and NDT Equipment Inventory System for Documentation Purpose”. International Journal of Advanced Science and Technology, Vol. 28, no. 6, Sept. 2019, pp. 86 -90, http://sersc.org/journals/index.php/IJAST/article/view/375.