1. Abney, S., 1987. The English Noun Phrase and its Sentential Aspect. Doctoral Dissertation, MIT.
2. Azuma, S., 1991. Processing and Intra-sentential Code-switching. Doctoral Dissertation. University of Texas, Austin.
3. The frame-content hypothesis in speech production: evidence from intrasentential code switching;Azuma;Linguistics,1993
4. Lexical categories and code-switching: a study of Japanese/English code-switching in Japan;Azuma;The Journal of the Association of Teachers of Japanese,1997
5. Two in One—Bilingual Speech of Turkish Immigrants in the Netherlands;Backus,1996