Yaghoobi, M. et al. 2021. Evaluating the Effect of Asymmetric Cross-section in Free Vibration and Bending Analysis Results of FG Sandwich Beam by Proposing Simple Efficient Element. Periodica Polytechnica Civil Engineering. 65, 2 (Jan. 2021), 638–648. https://doi.org/10.3311/PPci.17447.