%0 Journal Article %A Umberto Zannier %T On periodic mod p sequences and G-functions (On a conjecture of Ruzsa). %J Manuscripta mathematica %D 1996 %P 391-402 %V 90 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1996__90_2_156201/ %F MM2_1996__90_2_156201