F. H. Kamaru Zaman, A. A. Sulaiman, S. A. Che Abdullah, M. F. Abdul Latip, and Z. I. Rizman, “Automated Visitor Record System”, Int. J. Adv. Sci. Eng. Inf. Technol., vol. 7, no. 5, pp. 1784–1789, Oct. 2017.