Govardhani. Immadi, M. Venkata Narayana, A. Sree Madhuri, M. Mounika, P. Jyothirmayee, K. Geethasree. “Implementation of Digital Code Lock With Emergency Alarm System”. International Journal of Advanced Science and Technology 29, no. 05 (May 27, 2020): 8345-8350. Accessed May 1, 2024. http://sersc.org/journals/index.php/IJAST/article/view/18651.