1. On the number of congruent simplices in a point set;Agarwal,2001
2. Exact point pattern matching and the number of congruent triangles in a three-dimensional pointset;Brass,2000
3. Algorithms in Combinatorial Geometry;Edelsbrunner,1987
4. A problem of Leo Moser about repeated distances on the sphere;Erdős;Amer. Math. Monthly,1989