1. Annamalai, E.. 1989. The language factor in code mixing. International Journal of the Sociology of Language 75: 47–54.
2. Arad, Maya. 2002. Universal features and language-particular morphemes. In Theoretical approaches to universals, ed. Artemis Alexiadou, 15–40. Amsterdam: John Benjamins.
3. Bavin, Edith, and Tim Shopen. 1985. Warlpiri and English: Languages in contact. In Australia, meeting place of languages, ed. Michael Clyne, 81–94. Canberra: Australia National University.
4. Belazi, Hedi M., Edward J. Rubin, and Jacqueline Toribio Almeida. 1994. Code switching and X-Bar theory: The functional head constraint. Linguistic Inquiry 25: 221–237.
5. Boeckx, Cedric. 2007. Understanding minimalist syntax. Oxford: Blackwell.