Yaghoobi, M., Sedaghatjo, M., Alizadeh, R., Karkon, M. “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), pp. 638–648, 2021. https://doi.org/10.3311/PPci.17447