An analytical study on the nonlinear forced vibration of functionally graded carbon nanotube-reinforced composite beams on nonlinear viscoelastic foundation. Arch. Mech. [Internet]. 2020 Apr. 30 [cited 2025 May 13];72(2):81-107. Available from: https://am3.ippt.pan.pl/index.php/am/article/view/v72p81