1. Adachi, N., 1997. Language choice: an ethnographic study of the Nôhon-shugi ideology and language maintenance of Japanese immigrants in Brazil. Unpublished PhD dissertation. University of Toronto.
2. Gender roles, women's speech, and ethnic and community boundaries in a Japanese–Brazilian commune;Adachi,1998
3. Rules for Conversation Rituals in Japanese;Aoki,1988
4. Selection of Japanese categories during social interaction;Aoyagi,1995
5. Politeness: Some Universals in Language Usage;Brown,1987