VRUSHALI RAJ NATHE. Microcontroller Based Automatic Bell System for School and College. Journal of Electronic Design Engineering, [S. l.], v. 8, n. 3, p. 33–37, 2022. Disponível em: http://matjournals.co.in/index.php/JOEDE/article/view/1354. Acesso em: 24 feb. 2025.