Pierce McMahon J, Durán Escribano P. Analysing written production competence descriptors for academic and professional purposes and their calibration to the CEFR. Ibérica [Internet]. 2012 Jan. 2 [cited 2024 Oct. 7];(23):109-30. Available from: https://www.revistaiberica.org/index.php/iberica/article/view/312