1. Aguilar, M., & Muñoz, C. (2013). The effect of proficiency on CLIL benefits in engineering students in Spain. International Journal of Applied Linguistics (in press).
2. Aguilar, M., & Rodríguez, R. (2012). Lecturer and student perceptions on CLIL at a Spanish university. International Journal of Bilingual Education and Bilingualism, 15, 183–197.
3. Airey, J. (2011). Talking about teaching in English: Swedish university lecturers’ experiences of changing teaching language. Ibérica, 22, 35–54.
4. Airey, J., & Linder, C. (2006). Language and the experience of learning university physics in Sweden. European Journal of Physics, 27, 553–560.
5. Ball, P., & Lindsay, C. (2013). Language demands and support for English-medium instruction in tertiary education: Learning from a specific context. In A. Doiz, D. Lasagabaster, & J. M. Sierra (Eds.), English-medium instruction at universities: Global challenges (pp. 44–61). Bristol, UK: Multilingual Matters.