1. A characterization of astral (n4) configurations;Berman;Discrete Comput. Geom.,2001
2. Algebraic Graph Theory;Biggs,1993
3. Computational Synthetic Geometry;Bokowski,1989
4. The orchard problem;Burr;Geom. Dedicata,1974
5. My graph;Coxeter;J. London Math. Soc.,1983