OMRAN AL-SHAMMA. A Comparative Study of Cost Estimation Models used For Preliminary Aircraft Design. Global Journals of Research in Engineering, [S. l.], v. 14, n. B4, p. 9–18, 2014. Disponível em: https://engineeringresearch.org/index.php/GJRE/article/view/1174. Acesso em: 6 may. 2024.