Younes, Mohamed N., Ali Z. Heikal, Akram S. Kotb, and Haytham N. Zohny. “Field Study of the Noise Exposure Inside Running Metro Unit”. Civil Engineering Journal 7, no. 3 (March 1, 2021): 560–574. Accessed June 25, 2025. https://www.civilejournal.org/index.php/cej/article/view/2728.