LIN, T.-W.; WANG, C.-H. Minimisation of Non-periodic Preventive Maintenance Cost in Series-Parallel Systems. Defence Science Journal, [S. l.], v. 61, n. 1, p. 44–50, 2010. DOI: 10.14429/dsj.61.61. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/61. Acesso em: 16 jun. 2025.