et. al., Dr. T. J.Nagalakshmi ,. “Intelligent Door Knocking Security System Using IOT”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 2 (April 11, 2021): 2540–2543. Accessed April 28, 2024. https://turcomat.org/index.php/turkbilmat/article/view/2205.