1. Artlandia – All patterns, all easy (online);Artlandia,2008
2. Dichromatic plane groups;Belov,1964
3. William Thomas Astbury 1898-1961;Bernal;Biographical Memoirs of Fellows of the Royal Society,1963
4. Les Éléments de L’art Arabe: Le Trait des Entrelacs, Paris: Firmin- Didot; reprinted (2nd edn) (1973) Arabic Geometrical Pattern Design;Bourgoin,1897
5. American;Brainerd;Antiquity,1942