Team, Support. “Global Residue Harmonic Balance Method for Obtaining Higher-Order Accurate Solutions to the Strongly Nonlinear Oscillator: Gamal Mohamed Ismail, Md. Alal Hosen”. Thai Journal of Mathematics 18, no. 4 (December 1, 2020): 1947–1959. Accessed May 20, 2024. https://thaijmath2.in.cmu.ac.th/index.php/thaijmath/article/view/1114.