MRS.A. DIVYA. Iot Based Coal Mine Safety Monitoring System. INTERNATIONAL JOURNAL OF MANAGEMENT RESEARCH AND REVIEW, India, v. 13, n. 3, p. 1–05, 2023. Disponível em: https://ijmrr.com/index.php/ijmrr/article/view/367. Acesso em: 7 oct. 2026.