Andrade, E. (2000), “La relación genotipo-fenotipo y su posible extrapolación al estudio del comportamiento y la cultura humanos”, Ludus Vitalis. Journal of Philosophy of Life Sciences (VII) 14: 189-202.

Andrade, E. (2006), “How a semiotic perspectiva clarifies the Evo/Devo debate” (sometido a Ludus Vitalis).

Barbieri, M. (2003), The Organic Codes. An Introduction to Semantic Biology. Cambridge: Cambridge University Press.

Crick, F.H. (1968), “The origin of the genetic code,” J. Mol. Biol. 38: 367-379.

Darwin, Ch. R. (1874), The Descent of Man and Selection in Relation to Sex. Revised Edition. Chicago and New York: Rand, McNally & Company, Publishers.

Di Giulio, M. (2005a), “The origin of the genetic code: theories and their relationships, a review,” Biosystems 80: 175-184.

Di Giulio, M. (2005b), “Structuring of the genetic code took place at acidic PH,” J. Theor. Biol. 237: 219-226.

Di Giulio, M. (1997), “On the origin of the genetic code,” J. Theor. Biol. 187: 573-581.

Di Giulio, M. (1995), “The phylogeny of tRNAs seems to confirm the predictions of the coevolution theory of the origin of the genetic code,” Orig. Life Evol. Biosph. 25: 549-564.

Hoffmeyer, J. & Emmeche, C. (1991), “Code-Duality and the Semiotics of Nature”. En Anderson, M. & Merrell, F., (eds.). On Semiotic Modeling. Mouton de Gruyter, Berlin and New York, pp: 117-166

Leakey, R. & Lewin, R. (1979), “The origins of human language”. New Scientist, 20.9.1979, 894-897.

López-García, A. (2005), The Grammar of Genes. How the Genetic Code Resembles the Linguistic Code. Bern: Peter Lang AG, European Academic Publishers.

Wong, J.T.F. (1988), “Evolution of the genetic code,” Microbiol. Sci. 5: 174-181.

Wong, J.T.F. (1981), “Co-evolution of genetic code and amino acid biosynthesis,” Trends Biochem. Sci. 6: 33-35.

Wong, J.T.F. (1975), “A Co-evolution theory of the genetic code,” Proc. Natl. Acad. Sc.i USA 72: 1909-1912.