Sabri Mohammed, Mustafa, and Dhia A. Salal. “Numerical Analysis of Natural Frequency for U-Shaped Expansion Bellows in Fixed-Fixed and Fixed-Free Conditions”. Diyala Journal of Engineering Sciences 15, no. 3 (September 1, 2022): 106–116. Accessed November 23, 2024. https://djes.info/index.php/djes/article/view/937.