PASSMORE, E. C. Some aspects of signals in the I.A.F. Defence Science Journal, [S. l.], v. 2, n. 2-3, p. 113–117, 2013. DOI: 10.14429/dsj.2.3377. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/3377. Acesso em: 17 jun. 2025.