%0 Journal Article %A I. V. Gaishun %T Periodicity of Solutions of Two-Parameter Discrete Systems over Finite Fields %J Differencialʹnye uravneniâ %D 2002 %P 949-954 %V 38 %N 7 %I mathdoc %U http://geodesic.mathdoc.fr/item/DE_2002_38_7_a11/ %G ru %F DE_2002_38_7_a11