Nguyen-Van, T., and T. Bui-Tien. “Investigation of the Eigenvector of Stochastic Finite Element Methods of Functionally Graded Beams With Random Elastic Modulus”. Engineering, Technology & Applied Science Research, vol. 13, no. 4, Aug. 2023, pp. 11253-7, doi:10.48084/etasr.5991.