Saurabh Sharma, and Dr.D.D. Chaudhary. “Door Lock System Using Raspberry Pi”. International Journal of Advance Engineering and Research Development (IJAERD) 7, no. 7 (July 25, 2020): 157–160. Accessed July 6, 2025. https://ijaerd.org/index.php/IJAERD/article/view/4701.