check this list. Try to see if you find anything useful:

Barcelona European Council. (2002) Presidency Conclusions.

Commission of the European Communities. (2003) "Promoting Language Learning

and Linguistic Diversity: An Action Plan 2004-2006”. Brussels.

Dalton-Puffer, C. & Nikula, T. (2006) (Eds) Current Research on CLIL. Vienna

English Working Papers.15 (3). Vienna: Austria.

Eurydice. (2006) Content and Language Integrated Learning at School in Europe.

European Commission.

Grabe, W., & Stoller, F.L. (1997) Content-based instruction: Research foundations. In

Snow, M.A. & Brinton, D.M. (Eds.). The content-based classroom: Perspectives

on integrating language and content (pp. 5-21). White Plains, NY: Longman.

Llinares Garcia, A. (2005) An introduction to CLIL. Presentation at Cracow European

Language Label Conference.

Llinares García, A. (2007) Classroom bilingualism at the preschool level: towards a

more natural EFL context. In Pérez Vidal, Bel and Garau (eds) A Portrait of the

Young in Multilingual Spain. 185-199. Clevedon: Multilingual Matters.

Mehisto, P. & Asser, H. (2007) Stakeholder Perspectives: CLIL Programme

Management in Estonia, International Journal of Bilingualism and Bilingual

Education, 10(5), 683-701.

Sanz, C. (2000) Bilingual Education Enhances Third Language Acquisition: Evidence

from Catalonia, Applied Psycholinguistics 21: 23-44.

Serra, C. (2007) Assessing CLIL at Primary School: A Longitudinal Study.

International Journal of Bilingualism and Bilingual Education, 10(5), 582-602.

Stoller, F. (2004) Content-based instruction: Perspectives on curriculum planning.

Annual Review of Applied Linguistics, 24, 261-283.

Dear Ilaria,

This is a paper from Japan, but it matches your research area. Best wishes, David

I found this article today, and remembered your question. This seems really close to your need.

https://www.researchgate.net/publication/269289098_Vocabulary_growth_in_young_CLIL_and_traditional_EFL_learners_Evidence_from_research_and_implications_for_education

Article Vocabulary growth in young CLIL and traditional EFL learners...

Thank you all, thanks David!

Thank you Maria, the list is useful

Many Thanks! 

Let's do research collaboration between researchers around the world