SOLVABILITY OF THE THIRD-ORDER KORTEWEG-DE VRIES (KDV) EQUATION BY VARIATIONAL ITERATION AND NEW ITERATIVE METHODS. FJST [Internet]. 31 déc. 2020 [cité 18 mai 2026];6(2):19-26. Disponible sur: https://lafiascijournals.org.ng/index.php/fjst/article/view/173