CORRAL-ROBLES, S.; SÁNCHEZ-MARTÍN, M.; GONZÁLEZ-GIJÓN, G. Design and validation of a system of categories to assess the written discourse of L2 English learners. Porta Linguarum. An International Journal of Foreign Language Teaching and Learning, Granada, Spain, n. 36, p. 159–174, 2021. DOI: 10.30827/portalin.vi36.15944. Disponível em: https://revistaseug.ugr.es/index.php/portalin/article/view/15944. Acesso em: 9 jun. 2026.