Rahmani , Masoud, and Amin Moslemi Petrudi. “Analytical Study of Nonlinear Vibrations of Marine Risers by Newton Harmonic Balance Method”. Journal of Advanced Mechanical Engineering Applications, vol. 1, no. 2, Nov. 2020, pp. 64-73, https://penerbit.uthm.edu.my/ojs/index.php/jamea/article/view/6366.