Kumar, R. Naveen, R. Sriaishwarya, S. Vishali, G. Vivekanandhan, and S. Karthikeyan. “Wireless Electronic Notice Board Using GSM”. International Journal of Research in Engineering, Science and Management 4, no. 7 (July 19, 2021): 186–188. Accessed November 23, 2024. https://journal.ijresm.com/index.php/ijresm/article/view/1027.