Shafiei, H., and A.R. Setoodeh. “An Analytical Study on the Nonlinear Forced Vibration of Functionally Graded Carbon Nanotube-Reinforced Composite Beams on Nonlinear Viscoelastic Foundation”. Archives of Mechanics 72, no. 2 (April 30, 2020): 81–107. Accessed December 11, 2025. https://am.ippt.pan.pl/index.php/am/article/view/v72p81.