BISWAS, K. Airworthiness Approval of Design Firms. Defence Science Journal, [S. l.], v. 56, n. 1, p. 39–46, 2006. DOI: 10.14429/dsj.56.1867. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/1867. Acesso em: 29 jun. 2025.