M. Li, F. C. Langbein, R. R. Martin. Detecting Approximate Symmetries of Discrete Point Subsets. Computer-Aided Design, 40(1):76-93, 2008. [DOI:10.1016/j.cad.2007.06.007] [PDF] Detecting Approximate Symmetries of Discrete Point Subsets1st January 2008 in Design Intent Detection tagged publication