%0 Journal Article %A Andrzej Schinzel %T A refinement of a theorem of Gerst on power residues %J Acta Arithmetica %D 1970 %P 161-168 %V 17 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-17-2-161-168/ %R 10.4064/aa-17-2-161-168 %G en %F 10_4064_aa_17_2_161_168