PETROV, G.; MITOV, B. Reuse of computer systems in Bulgaria – analysis of market trends. Annual of Natural Sciences Department, [S. l.], v. 10, p. 1–11, 2025. DOI: 10.33919/ansd.25.10.1. Disponível em: https://ojs.nbu.bg/index.php/ANSD/article/view/1402. Acesso em: 2 jun. 2026.