OYEBOLA BLESSED OLALEKAN. Development of a Sim800l Based Reprogrammable Household Smart Security System with Recipient Phone Call Alert. International Journal of Computer Engineering in Research Trends, [S. l.], v. 4, n. 1, p. 15–20, 2017. Disponível em: https://www.ijcert.org/index.php/ijcert/article/view/345. Acesso em: 21 jul. 2026.