[1] R.-Z. Wang, C.-F. Lin, J.-C. Lin, Image hiding by optimal LSB substitution and genetic algorithm, Pattern recognition, 34(3) (2001) 671-683.
[2] M.A. Abdel-Wahab, H. Selim, U. Sayed, A new method for digital image watermarking based on Vector Quantization (VQ).
[3] C.-C. Chang, W.-L. Tai, C.-C. Lin, A reversible data hiding scheme based on side match vector quantization, IEEE Transactions on Circuits and Systems for Video Technology, 16(10) (2006) 1301-1308.
[4 N.J. Hopper, Toward a theory of Steganography, CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE, 2004.
[5] M.S. Shahreza, An improved method for steganography on mobile phone, WSEAS Transactions on Systems, 4(7) (2005) 955-957.
[6] J. Fridrich, P. Lisonek, Grid colorings in steganography, IEEE Transactions on Information Theory, 53(4) (2007) 1547-1549.
[7] W. Zhang, X. Zhang, S. Wang, Twice Gric Colorings in Steganography, in: Intelligent Information Hiding and Multimedia Signal Processing, 2008. IIHMSP’08 International Conference on, IEEE, 2008, pp. 1301-1304.
[8] S. Yue, Z.-H. Wang, C.-Y. Chang, C.-C. Chang, M.-C. Li, Image data hiding schemes based on graph coloring, Ubiquitous Intelligence and Computing, (2011) 476-489.
[9] M. Nafari, G.H. Sheisi, M.N. Jahromi, New data hiding method based on neighboring correlation of blocked image, in: International Conference on Digital Information and Communication Technology and Its Applications, Springer, 2011, pp. 787-801.
[10] S.M. Douiri, M.O. Medeni, S. Elbernoussi, New steganography scheme using graphs product, in: Interactive Collaborative Learning (ICL), 2014 International Conference on, IEEE, 2014, pp. 525-528.
[11] W. Astuti, U.N. Wisety, Data Hiding Scheme on Medical Image using Graph Coloring, in: Journal of Physics: Conference Series, IOP Publishing, 2015, pp. 012028.
[12] S.-H. Chiang, J.-H. Yan, On L (d, 1)-labeling of Cartesian product of a cycle and a path, Discrete Applied Mathematics, 156(15) (2008) 2867-2881.
[13] D.B. West, Introduction to graph theory, Prentice hall Upper Saddle River, 2001.