1. Barbieri, M.: The Organic Codes: An Introduction to Semantic Biology. Cambridge University Press, Cambridge (2003)
2. Campbell, N.A., Reece, J.B., Mitchell, L.G.: Biology, 5th edn. Benjamin/Cummings, Menlo Park (1999)
3. Chou, H.-H., Reggia, J.A.: Problem solving during artificial selection of selfreplicating loops. Physica D 115(3-4), 293–312 (1998)
4. Drexler, K.E.: Nanosystems: Molecular Machinery, Manufacturing, and Computation. John Wiley, New York (1992)
5. Imai, K., Hori, T., Morita, K.: Self-reproduction in three-dimensional reversible cellular space. Artificial Life 8(2), 155–174 (2002)