%0 Journal Article %A Ashish Kumar Prasad %A Anant Pratap Singh %A Sony Khatri %T Duality for a Class of Second Order Symmetric Nondifferentiable Fractional Variational Problems %J Yugoslav journal of operations research %D 2020 %P 121 %V 30 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/YJOR_2020_30_2_a0/ %G en %F YJOR_2020_30_2_a0