Dr PVL Suvarchala, Pannala Mahitha, Gunde Akhila, Pathulothu Mahesh, and Mangalampally Yashwanth Raj. “SMART DOOR KNOCK OR OPEN-ALERT NOTIFICATION SYSTEM”. American Journal of AI Cyber Computing Management 6, no. 3 (July 9, 2026): 199–208. Accessed July 28, 2026. https://ajaccm.com/journal/index.php/ajaccm/article/view/748.