%0 Journal Article %A László Budai %T GeoGebra in fifth grade elementary mathematics at rural schools %J Annales mathematicae et informaticae %D 2011 %P 129-136 %V 38 %I mathdoc %U http://geodesic.mathdoc.fr/item/AMI_2011_38_a13/ %G en %F AMI_2011_38_a13