[1] Komatsu H. Journal of the Gemmological Society of Japan, 1999, 20(1-4): 111.
[2] Hargett D. Gems & Gemology, 1989, 25(3): 174.
[3] Elen S. Gems & Gemology, 2002, 38(2): 156.
[4] Elen S. Gems & Gemology, 2001, 37(2): 114.
[6] Needham A E. The Significance of Zoochromes. New York: Springer-Verlag, Berlin, Heidelberg, 1974. 1.
[8] Gauthier J P, Lasnier B. Revue de Gemmologie A.F.G., 1990, 103: 3.
[9] Parker A R. Journal of the Royal Society Interface, 2005, 2(2): 1.
[10] Vukusic P. Sambles J R, Lawrence C R. Nature, 2000, 404: 457.
[11] Vukusic P, Sambles J R, Lawrence C R. Nature, 2003, 424: 852.
[12] Zi J, Yu X, Li Y, et al. PNAS, 2003, 100(22): 12576.
[13] Paker A R, Welch V L, Driver D, et al. Nature, 2003, 426: 786.
[14] Yablonovitch E. Physical Review Letters, 1987, 58(20): 2059.
[15] John S. Physical Review Letters, 1987, 58(20): 2486.
[16] Pokroy B, Fieramosca J S, Von Dreele R B, et al. Chemistry of Materials, 2007, 19(13): 3244.