AHMED, Arman. M.A.; SEEDAHMED, A.I.; ALI, Tyseer.Y. M. Estimate Friction Factor for Polypropylene Pipes. Engineering And Technology Journal, [S. l.], v. 7, n. 9, p. 1467–1470, 2022. DOI: 10.47191/etj/v7i9.05. Disponível em: https://everant.org/index.php/etj/article/view/704. Acesso em: 22 jul. 2024.