List of Articles Fractional variable-order with proportional delays Open Access Article Abstract Page Full-Text 1 - A Novel Shifted Jacobi Operational Matrix for Solution of Nonlinear Fractional Variable-Order Differential Equation with Proportional Delays حمید خدابنده لو الیاس شیوانیان سعید عباسبندی 10.30495/ijim.2022.64043.1555