R. N. Kumar, R. Sriaishwarya, S. Vishali, G. Vivekanandhan, and S. Karthikeyan, “Wireless Electronic Notice Board using GSM”, IJRESM, vol. 4, no. 7, pp. 186–188, Jul. 2021, Accessed: May 04, 2024. [Online]. Available: https://journal.ijresm.com/index.php/ijresm/article/view/1027