NAGARATNAM, A. A preliminary note on the radioactivity of wrist watches with luminous dials. Defence Science Journal, [S. l.], v. 9, n. 1, p. 38–39, 2014. DOI: 10.14429/dsj.9.7616. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7616. Acesso em: 1 jul. 2025.