Friends of Open Access. Tikrit Journal of Engineering Sciences, [S. l.], v. 27, n. 3, p. 1–7, 2021. DOI: 10.25130/tjes.27.3.PB1. Disponível em: https://tj-es.com/ojs/index.php/tjes/article/view/173.. Acesso em: 9 sep. 2026.