%0 Journal Article %A Amirahmad Khajehnasiri %A M. Afshar Kermani %A Rezza Ezzati %T Fractional Order Operational Matrix Method for Solving Two-Dimensional Nonlinear Fractional Volterra Integro-Differential Equations %J Kragujevac Journal of Mathematics %D 2021 %P 571 %V 45 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2021_45_4_a4/ %G en %F KJM_2021_45_4_a4