1. Davies, Mark . 2008–. The Corpus of Contemporary American English (COCA): 560 million words, 1990–present. Available online at www.english-corpora.org/coca/ (accessed from 2 March to 13 September 2018).
2. Grammaticalization
3. Schnoebelen, Tyler . 2014. Innovating because innovation. Corpus Linguistics WordPress, 15 January. https://corplinguistics.wordpress.com/2014/01/15/innovating-because-innovation/ (accessed 1 March 2018).
4. Langacker, Ronald . 2000. A dynamic usage-based model. In Barlow & Kemmer (eds.), 1–63.
5. Reference-point constructions