1. Alt, H., et al.: Congruence, similarity and symmetries of geometric objects. ACM J.Comp. 4, 308–315 (1987)
2. Atallah, M.: On symmetry detection. IEEE Transactions on Computers 34(7), 663–666 (1985)
3. Avnir, D., Meyer, A.Y.: Quantifying the degree of molecular shape deformation: a chirality measure. J. Molecular Structure (Theochem) 94, 211–222 (1991)
4. S.Cavalcanti and A.Menezes e Cruz. Tiles in the Secular Architecture of Pernambuco, 19th Century, Metalivros, 2002.
5. Berger, M.: Computer Graphics with Pascal. Addison-Wesley, Reading (1986)