1. Bahnsen, A. C., & Villegas, S. (2017). Machine learning algorithms explained – K-means clustering. https://blog.easysol.net/machine-learning-algorithms-3/
2. Bilingualism and the development of executive function: the role of attention;Bialystok;Child Development Perspectives,2015
3. Multimodal Learning Analytics and Education Data Mining: using computational technologies to measure complex learning tasks
4. Devlin, K. (2015). Learning a foreign language a ‘must’ in Europe, not so in America. http://www.pewresearch.org/fact-tank/2015/07/13/learning-a-foreign-language-a-must-in-europe-not-so-in-america/
5. Jackson, A. (2013). Foreign language policies around the world. http://blogs.edweek.org/edweek/global_learning/2013/03/foreign_language_policies_around_the_world.html