Pham, Lien, and Ninh Vu. “Influence of Temperature and Porosities on Free Vibration of a Three-Phase Bidirectional Functionally Graded Sandwich Beam”. VNUHCM Journal of Engineering and Technology 5, no. SI2 (December 31, 2023): 65-76. Accessed July 3, 2024. https://stdjet.scienceandtechnology.com.vn/index.php/stdjet/article/view/1095.