Ortega, Mireia. “Cross-Linguistic Influence in Multilingual Language Acquisition: The Role of L1 and Non-Native Languages in English and Catalan Oral Production”. Íkala, Revista de Lenguaje y Cultura 13, no. 1 (October 30, 2008): 121-142. Accessed January 16, 2022. https://revistas.udea.edu.co/index.php/ikala/article/view/2694.