1. Washburn, D.K., Crowe, D.W.: Symmetries of Culture: Theory and Practice of Plane Pattern Analysis. University of Washington Press, Seattle (1988)
2. Grünbaum, B., Shephard, G.C.: Tilings and Patterns. W. H. Freeman, New York (1987)
3. Shubnikov, A.V., Koptsik, V.A.: Symmetry in Science and Art. Plenum Press, NY (1974)
4. An Introduction to Symmetry;G.E. Martin,1982
5. Schattschneider, D.: The Plane Symmetry Groups: Their Recognition and Notation. The American Mathematical Monthly 85, 439–450 (1978)