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Deuchar, Margaret (2006-11-01). “Welsh-English code-switching and the Matrix Language Frame model” (英語). Lingua116 (11): 1986–2011. doi:10.1016/j.lingua.2004.10.001. ISSN0024-3841.
Deuchar, Margaret (December 2005). “Congruence and Welsh–English code-switching” (英語). Bilingualism: Language and Cognition8 (3): 255–269. doi:10.1017/S1366728905002294. ISSN1469-1841.