%0 Journal Article %A R. M. Hafez %A Y. H. Youssri %T Shifted Gegenbauer-Gauss Collocation Method for Solving Fractional Neutral Functional-Differential Equations with Proportional Delays %J Kragujevac Journal of Mathematics %D 2022 %P 981 %V 46 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/KJM_2022_46_6_a11/ %G en %F KJM_2022_46_6_a11