“Experimental and Numerical Evaluation of the Fundamental Natural ‎Frequency of a Spherical Core Sandwich Structure.‎”, JUBES, vol. 30, no. 3, pp. 61–73, Oct. 2022, Accessed: May 03, 2025. [Online]. Available: https://www.journalofbabylon.com/index.php/JUBES/article/view/4332