1. Boudjemaï, F., Enberg, P. B., & Postaire, J. -G. (2003). Self organizing spherical map architecture for 3D object modeling. In Proceedings of workshop on self-organizing maps
2. The world in perpective: A directory of world map projections;Canters,1989
3. Readings in information visualization: Using vision to think;Card,1999
4. Explorations in the geometry of thinking;Fuller,1975
5. Hirokazu, N., Altaf-Ul, A. M., Ken, K., Kotaro, M., & Shigehiko, K. (2005). Spherical SOM with arbitrary number of neurons and measure of suitability. In Proceedings of the 5th workshop on self-organizing maps. University Paris 1, Panthon-Sorbonne