Erman, Britt, and Margareta Lewis. “A Comparison of English Vocabulary in the Spoken Production of One Non-Native Long-Residency Group, One Non-Native University Group and One Native Group in Three Tasks”. Nordic Journal of English Studies 18, no. 2 (October 4, 2019): 37–61. Accessed September 1, 2024. https://publicera.kb.se/njes/article/view/26200.