Hung, Dang, and Huong Truong. “Free Vibration Analysis of Sandwich Beams With FG Porous Core and FGM Faces Resting on Winkler Elastic Foundation by Various Shear Deformation Theories”. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE 12, no. 3 (April 30, 2018): 23-33. Accessed April 29, 2024. https://stce.huce.edu.vn/index.php/en/article/view/1168.