A Virtual Environment for English as Foreign Language Learning Platform (veEFL): Applied "Single Idea of Concept" to Improve Writing skill of Low English Proficiency Students. International Conference on Computers in Education, [S. l.], 2013. DOI: 10.58459/icce.2013.1205. Disponível em: https://library.apsce.net/index.php/ICCE/article/view/1205. Acesso em: 28 aug. 2025.