1. An Introduction to Embryology;Balinsky,1975
2. Principles of Neural Development;Purves,1985
3. Embryonic Development and Induction;Spemann,1938
4. Dynamic aspects of neural induction;Eyal-Giladi;Arch Biol,1954
5. Activation and organization of the central nervous system in amphibians. I, II, and III;Nieuwkoop;J Exp Zool,1952