List of Articles Operational matrices Open Access Article Abstract Page Full-Text 1 - Jacobi Operational Matrix Approach for Solving Systems of Linear and Nonlinear Integro-Differential Equations Khadijeh Sadri Zainab Ayati Open Access Article Abstract Page Full-Text 2 - Approximate solution of system of nonlinear Volterra integro-differential equations by using Bernstein collocation method Sara Davaeifar Jalil Rashidinia