List of Articles perturbation term Open Access Article Abstract Page Full-Text 1 - Shifted Chebyshev Approach for the Solution of Delay Fredholm and Volterra Integro-Differential Equations via Perturbed Galerkin Method Kazeem Issa Jafar Biazar Babatunde Yisa 20.1001.1.25885723.2019.11.2.8.9 Open Access Article Abstract Page Full-Text 2 - Numerical solution of integro-differential equations via pertubed-Gegenbauer, Jacobi polynomials and Galerkin method Kazeem Issa Kazeem Aliu Kazeem Arokoola Kazeem Micah