1. The 1931 I C I Standard Observer and Coordinate System for Colorimetrya,b
2. H. Kanazawaet al., “Color conversion for multi-primary displays using a spherical average method,”Proc. CIC, 65–69 (2004).
3. On zonotopes
4. R. V. Benson,Euclidean Geometry and Convexity(McGraw-Hill Book Company, New York, 1966), Sec. 2.8.
5. S. R. Lay,Convex Sets and Their Applications(Dover Publications, Inc., New York, 2007).