Andrià, M. “Crosslinguistic Influence in the Acquisition of Greek As a Foreign Language by Spanish/Catalan L1 Learners: The Role of Proficiency and Stays Abroad”. Anuari De Filologia. Estudis De Lingüística, vol. 5, Dec. 2015, pp. 159-60, https://revistes.ub.edu/index.php/AFEL/article/view/14884.