1. Makishima Shoji (2001) Pattern Dynamics: A Theory of Self-Organization. Kodansha Scientific, Ltd., Japan.
2. Otto Frei (1984) Diatoms I: Shells in Nature and Technics. Institut fur Leichte Flachentragwerke, West Germany.
3. Otto Frei (1990) Radiolaria: Shells in Nature and Technics II. Institut fur Leichte Flachentragwerke, Germany.
4. Pearce Peter (1978) Structure in Nature Is a Strategy for Design. MIT Press, Massachusetts.
5. The Rad Page (2001) http://radpage.univ-lyon1.fr/rad_en.html#Introduction, June [September 2001].