%0 Journal Article %A Henri Virtanen %T The mean fourth power of real character sums %J Acta Arithmetica %D 2002 %P 249-257 %V 103 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa103-3-4/ %R 10.4064/aa103-3-4 %G en %F 10_4064_aa103_3_4