%0 Journal Article %A Valcheva, Donika %A Todorova, Margarita %A Asenov, Oleg %T A 3D Model as a Tool for Increasing the Effectiveness of E-Learning %J Serdica Journal of Computing %D 2010 %P 475-486 %V 4 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJC_2010_4_4_a5/ %G en %F SJC_2010_4_4_a5