1. Dye, D.S.: A Grammar of Chinese Lattice. Harvard-Yenching Institute, Harvard University Press, Cambridge, MA (1937)
2. Goodman, J.E., O’Rourke, J.: Handbook of Discrete and Computational Geometry. CRC Press, Boca Raton (1997)
3. Hoffman, I., Soifer, A.: Almost chromatic number of the plane. Geombinatorics. III(2), 38–40 (1993)
4. Raiskii, D.E.: Realizing of all distances in a decomposition of the space Rn into n+1 Parts. Mat. Zametki 7, 319-323 (1970) [Russian]
5. Engl. transl., Math. Notes 7, 194-196 (1970)