SYSTEM TYPES AND ANALYTICAL APPROACHES. International Journal of Advance Scientific Research, [S. l.], v. 3, n. 08, p. 86–95, 2023. DOI: 10.37547/ijasr-03-08-13. Disponível em: https://sciencebring.com/index.php/ijasr/article/view/366. Acesso em: 7 jul. 2025.