[1] [1] L. Li, "Optical recording media having optically-variable security properties", U.S. Patent 5549953 (1996).

[2] [2] A. Argoitia, D. Chu, N. Teitelbaum, "Security Device With Metameric Features Using Diffractive Pigment Flakes", U.S. Patent Application 20100002275 (2010).

[3] [3] J. A. Dobrowolski, K. M. Baird, P. D. Carman, and A. Waldorf, Opt. Acta. 20, 925 (1973).

[4] [4] B. Baloukas, S. Larouche, and L. Martinu, SPIE 6075, 60750T (2006).

[5] [5] B. Baloukas and L. Martinu, Appl. Opt. 47, 1585 (2008).

[6] [6] B. Baloukas, J. M. Lamarre, and L. Martinu, Appl. Opt. 50, C41 (2011).

[7] [7] E. C. Goldenberg, B. Baloukas, O. Zabeida, J. K. Sapieha, and L. Martinu, Appl. Opt. 50, 3351 (2011).

[8] [8] B. Baloukas and L. Martinu, Appl. Opt. 51, 3346 (2012).

[9] [9] D. H. Lu, J. of Zheng zhou Univ. (Nat. Sci. Ed.) 40, 48 (2008).

[10] [10] W. J. Hu, S. Q. Tang, and Z. F. Zhu, Modern color science and application (Beijing, 1994).

[11] [11] J. F. Zhang, L. M. Liu, Z. D. Ye, Y. C. Lin, and X. L. Wang, Optical security technology and applications (Beijing, 2011).

[12] [12] B. Hill, Th. Roger and F. W. Vorhagen, ACM Transactions on Graphics 16, 109 (1997).

[13] [13] S. J. Wakeham, M. J. Thwaites, B. W. Holton, C. Tsakonas, W. M. Cranton, D. C. Koutsogeorgis, and R. Ranson, Thin Solid Films 518, 1355 (2009).