1. 1. Z.Hu, S.Liu, J.Jiang, R.Hong, M.Wang and S.Yan, “PicWords: Render a picture by packing keywords”, IEEE transactions on Multimedia, vol. 16, no. 4, June 2014, pp.1156 – 1164.
   2. J. Xu and C. S. Kaplan, “Calligraphic packing,” in Proc. Graphics Interface, 2007, pp. 43–50.
   3. Haeberli, P., “Paint by Numbers”. Proceeding SIGGRAPH ’90, Proceedings of the 17th annual conference on Computer graphics and interactive techniques, pp. 207-214.
   4. Dobashi J., Haga T., Johan H., Nishita T., “A method for creating Mosaic Images using Voronoi diagrams”, in Proceedings of Eurographics 2002, September 2002
   5. Faustino G.M., De Figueiredo L.H., “Simple Adaptive Mosaic Effects”, Proceedings of SIBGRAPI2005, August 2005.
   6. Di Blasi G., Gallo G., “Artificial Mosaics”, The Visual Computer, vol.21, issue 6, pp.373-383, 2005.
   7. Battiato S., Di Blasi G.,Farinella G.M., Gallo G., “A novel technique for mosaic rendering”, WSCG 2006, January 2006.
   8. A. Hausner, “Simulating decorative mosaics,” in Proc. 28th Annu. Conf. Computer Graphics and Interactive Techniques, 2001, pp. 573–580
   9. Elber E., Wolberg G., “Rendering Traditional Mosaics”, The Visual Computer, vol.19, issue 1, pp. 67- 78, 2003
   10. Schlechtweg S., Germer T., Strothotte T., “Render Bots – Multi Agent systems for direct Image generation”, Computer Graphics forum 24(2), pp.137-148, 2005.
   11. Harmon L.D., “The recognition of faces”, Scientific American vol.229 No.5, 1973.
   12. Neret G., Descharnes R., Dali, “The Paintings”, Taschen, Koln, 2001.
   13. Close C., http://www.chuckclose.coe.uh.edu/, 1970
   14. Silvers R.,Hawley M., “Photomosaics”, Henry Holt, New York, 1997.
   15. Runaway Technology. http://www.photomosaic.com/, 2006.
   16. hunt W.L., http://home.earthlink.net/~wlhunt/, 1998
   17. ArcSoft, PhotoMontage, http://www.arcsoft.com/,2006.
   18. Blake S., http://www.barcodeart.com/, 1998.
   19. Di Blasi G., Petralia M., “Fast Photo Mosaic”, Poster Proceedings of ACM/WSCG2005, January 2005.
   20. Cantone C., Farro A., Pulvirenti A., ReforgiatoRecupero D., Shasha D., “Antipole Tree indexing to support range search and K-nearest neighbor search in metric spaces”. IEEE/TKDE, vol.17, issue 4, pp.535-550, 2005
   21. Strand C., “Hello, Fruit Face!: The paintings of Giuseppe Arcimboldo”. Prestel, 1999.
   22. Di Blasi G., Gallo G., Petralia M., “Puzzle Image Mosaic” In proceedings of IASTED/VIIP2005, September 2005.
   23. J. Kimand F. Pellacini, “Jigsaw image mosaics,” ACM Trans. Graph., vol. 21, no. 3, pp. 657–664, 2002.
   24. J. Orchard and C. S. Kaplan, “Cut-out image mosaics,” in Proc. 6th Int. Symp.Non-Photorealistic Animation and rendering, 2008, pp. 79–87.
   25. X. Xu, L. Zhang, and T. T. Wong, “Structure-based ascii art,” ACM Trans. Graph., vol. 29, no. 4, pp. 52:1– 52:9, 2010.
   26. R. Maharik,M. Bessmeltsev, A. Sheffer, A. Shamir, and N. Carr, “Digital micrography,” in ACM Trans. Graph. (Proc. SIGGRAPH 2011), 2011, pp. 100:1– 100:12.