%0 Journal Article %A Ali Deniz %A Sahin Kocak %A Ynuns Ozdemir %A A. Ersin Ureyen %T Wallpaper Patterns with Self-Similar and Graph-Directed Fractal Lattice Units %J Visual Mathematics %D 2011 %V 13 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/VM_2011_13_2_a1/ %G en %F VM_2011_13_2_a1