Ghorbanpour Arani, A.A, Niknejad, S, Abbasian Arani, A.A. “Dynamic Response of Bi-Directional Functionally Graded Materials (BDFGMs) Beams Rested on Visco-Pasternak Foundation Under Periodic Axial Force.” Journal of Solid Mechanics, vol. 13, no. 3, 2021, pp. 269-285. 10.22034/jsm.2020.678358