Al-Ansari, S. (2000). Sheltered Curricular Exposure and Unsheltered Extra-Curricular Exposure as factors influencing the development of Academic Proficiency in ESL. International Review of Applied Linguistics in Language Teaching, 38, 175-194.
Andrade, M. S. (2006). International students in English-speaking universities: Adjustment factors. Journal of Research in International Education, 5(2), 131–154.
Brown, H. (2014). Contextual factors driving the growth of undergraduate English- medium instruction programmes at universities in Japan. The Asian Journal of Applied Linguistics, 1(1), 50–63.
“Chalmers, H. (2019). The role of the first language in English medium instruction. OUP ELT Position Paper. Available at: https://elt.oup.com/feature/global/expert/emi?cc=gb&selLanguage=en
Gierlinger, E. (2015). ‘You can speak German, sir’: on the complexity of teachers’ L1 use in CLIL. Language and Education, 29(4), 347-368.
Helm, F. (2019). EMI, internationalisation, and the digital. International Journal of Bilingual Education and Bilingualism, 1-12.
Jenkins, J. (2018). English Medium Instruction in Higher Education: The Role of English as Lingua Franca. Second Handbook of English Language Teaching, 1-18.
Klaassen, R. (2008). Preparing lecturers for English-medium instruction. Realizing content and language integration in higher education, 32-42.
Klaassen, R. G. (2003). English-medium degree programmes in higher education: From implementation to quality assurance. Multilingual Approaches in University Education: Challenges and Practices. Nijmegen: Valkof Pers & Talencentrum Universiteit Maastricht, 119-143.
Kuteeva, M., & Airey, J. (2014). Disciplinary differences in the use of English in higher education: Reflections on recent language policy developments. Higher Education, 67(5), 533-549.
Lee, J.-H. & Macaro, E. (2013). Investigating age in the use of L1 or English-only instruction: Vocabulary acquisition by Korean ESL learners. The Modern Language Journal, 97(4), 887-901.
Macaro, E. (2019). Exploring the role of language in English medium instruction. International Journal of Bilingual Education and Bilingualism, 1-14.
O’Dowd, R. (2018). The training and accreditation of teachers for English medium instruction: an overview of practice in European universities. International Journal of Bilingual Education and Bilingualism, 21(5), 553-563.