1. Bybee, J. L., Perkins, R. D., & Pagliuca, W. (1994). The evolution of grammar: Tense, aspect, and modality in the languages of the world (Vol. 196). University of Chicago Press.
2. Bybee, J. L. (2013). Usage-based theory and exemplar representations of constructions. In Th. Hoffmann & G. Trousdale (Eds.), The Oxford Handbook of Construction Grammar (online edn, 16 Dec. 2013), Oxford Academic. https://doi.org/10.1093/oxfordhb/9780195396683.013.0004. Accessed 9 Aug 2023.
3. Chomsky, N. (2012). On the nature, use and acquisition of language. In Language and meaning in cognitive science (pp. 13–32). Taylor and Francis.
4. Chomsky, N. (2014). Aspects of the theory of syntax (Vol. 11). MIT press.
5. De Saussure, F. (1916). Nature of the linguistic sign. Course in General Linguistics, 1, 65–70.