The Role of the Four-dimensional Product in Achieve Competitive Advantage. Journal of Madenat Alelem, [S. l.], v. 12, n. 2, p. 172–185, 2020. Disponível em: https://journal.mauc.edu.iq/index.php/JMAUC/article/view/374. Acesso em: 24 feb. 2026.