Michael A. Obe, Godspower C. Abanum, Innocent C. Eli. Variational Iteration Method for First and Second Order Ordinary Differential Equations using First Kind Chebychev Polynomials. IJASRE [Internet]. 2018 Aug. 5 [cited 2024 Nov. 22];4(8):126-31. Available from: https://ijasre.net/index.php/ijasre/article/view/656