%0 Journal Article %A Vučković, Bojan %T An Improved Upper Bound on Neighbor Expanded Sum Distinguishing Index %J Discussiones Mathematicae. Graph Theory %D 2020 %P 323-329 %V 40 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DMGT_2020_40_1_a21/ %G en %F DMGT_2020_40_1_a21