, 2013, Pragmatism and the evolution of semantic systems, in B. Küppers, U. Hahn & S. Artmann (eds.), Evolution of semantic systems, Dordrecht, Springer, pp. 13-29.
with Küppers, B. , Hahn, U. (eds) , 2013, Evolution of semantic systems, Springer, Dordrecht.
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, 2008, 'Organic problem solving: biology, decision theory, and the physical symbol system hypothesis', The American Journal of Semiotics 24 (1-3), 95-105.
, 2007, Computing codes versus interpreting life, in M. Barbieri (ed.), Introduction to biosemiotics, Dordrecht, Springer, pp. 209-234.
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