KSHIRSAGAR, A. M.; RANGANATHAN, S. A Problem in Replacement Theory. Defence Science Journal, [S. l.], v. 18, n. 1, p. 1–6, 2014. DOI: 10.14429/dsj.18.7421. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7421. Acesso em: 16 jun. 2025.