%0 Journal Article %A Máté Matolcsi %A Imre Z. Ruzsa %T Difference Sets and Positive Exponential Sums. II: Cubic Residues in Cyclic Groups %J Informatics and Automation %D 2021 %P 145-151 %V 314 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2021_314_a7/ %G ru %F TRSPY_2021_314_a7