“Experimental and Numerical Evaluation of the Fundamental Natural ‎Frequency of a Spherical Core Sandwich Structure.‎”. Journal of University of Babylon for Engineering Sciences 30, no. 3 (October 27, 2022): 61–73. Accessed May 3, 2025. https://www.journalofbabylon.com/index.php/JUBES/article/view/4332.