Smart Retail Shelf Invertory Monitoring System Using Iot And Gsm Technology. International Journal of Information and Electronics Engineering, [S. l.], v. 16, n. 2, p. 222–231, 2026. DOI: 10.48047/hwmve587. Disponível em: https://ijiee.org/index.php/ijiee/article/view/1129. Acesso em: 2 may. 2026.