M. SHUKUR, Zainab; NEAMAH, Raghad Azeez; ABDULSAMAD, Husam Jawad; AL-ANSARI, Luay S.; WITTAYAPIYANON, Sutartip. CALCULATING THE NATURAL FREQUENCY OF PRE-TWISTED BEAM. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 28, n. 1, p. 1–16, 2024. DOI: 10.31272/jeasd.28.1.1. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/2075.. Acesso em: 4 jun. 2026.