1. A Geography of the Welsh Language 1961–1991;Aitchison,1994
2. Two in One: Bilingual Speech of Turkish Immigrants in The Netherlands;Backus,1996
3. In-between languages: language shift/maintenance in childhood bilingualism;Bolonyai;International Journal of Bilingualism,1998
4. Boussofara-Omar, N., 1999. Arabic diglossic switching: an application of Myers-Scotton's MLF model, Ph.D. Thesis. University of Texas, Austin, unpublished.
5. Revisiting Arabic diglossic switching in light of the MLF model and its sub-models: the 4-M model and the abstract level model;Boussofara-Omar;Bilingualism, Language and Cognition,2003