Jäger, Gerhard & Rosenbach Anette. 2008. “Priming and Unidirectional Language Change”. Theoretical Linguistics 341.85–115.
Lass, Roger. 1990. “How To Do Things With Junk: Exaptation in language evolution”. Journal of Linguistics 261.79–102.
Prum, Richard O.2005. “The Evolution of Feather Diversity and Function: Exaptation, functional redundancy and historical contingency”. Evolving Form and Function: Fossils and development ed. by Derek E. G. Briggs, 245–256. New Haven: Peabody Museum of Natural History.