%0 Journal Article %A Karakostas, George L. %A Purnaras, Ioannis K. %T Singular regularization of operator equations in $L_1$ spaces via fractional differential equations %J Electronic Journal of Differential Equations %D 2016 %V 2016 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2016__2016__a52/ %G en %F EJDE_2016__2016__a52