Adnan Yaseen, Aya, Luay S. Alansari, Mohammed Hussain Alnajem, and Qusay S. Al-anssari. “Calculating the Frequency of Composite Plate and Composite Spherical Shell With Different Boundary Conditions”. International Journal of Engineering & Technology 7, no. 4 (November 5, 2018): 5007–5017. Accessed May 1, 2024. https://sciencepubco.com/index.php/ijet/article/view/25887.