1. Towards a plurilingual approach in English language teaching: Softening the boundaries between languages;Cenoz;TESOL Quarterly,2013
2. Coste , D. Moore , D. Zarate , G. 2009 Plurilingual and pluricultural competence http://www.coe.int/t/dg4/linguistic/Source/SourcePublications/CompetencePlurilingue09web_en.pdf
3. Council of Europe 2001 The common European framework of reference for languages: Learning, teaching, assessment http://www.coe.int/t/dg4/linguistic/source/framework_en.pdf