1. The chemical basis of morphogenesis
2. Memoires pour servir à l'histore d'un genre de polypes d'eau douce, à bras en forme de cornes;Trembley,1744
3. The Nervous Systems of Invertebrates: An Evolutionary and Comparative Approach;Grimmelikhuijzen,1995
4. Chapter 2 Biological Features and Physical Concepts of Pattern Formation Exemplified By Hydra