1. Alberts, B., Bray, D., Lewis, J., Raff, M., Roberts, K., & Watson, J.D. (1994). Molecular Biology of the
Cell.3rd edition. Garland, New York.
2. Barbieri M. (1981). The Ribotype Theory on the Origin of Life. Journal of Theoretical Biology, 91, 545–601.
3. Barbieri M. (1985). The Semantic Theory of Evolution. Harwood Academic Publishers, London and New York.
4. Barbieri M. (1998). The Organic Codes. The basic mechanism of macroevolution. Rivista di Biologia- Biology Forum, 91, 481–514.
5. Barbieri M. (2003). The Organic Codes. An Introduction to Semantic Biology. Cambridge University Press, Cambridge, UK.