D. Díaz, R. Ramírez, and D. Hernández-Leo. IEEE 15th International Conference on Advanced Learning Technologies (ICALT); 2015 Jul 06-Jul 09; Hualien, Taiwan.Sl: IEEE, 2015. p. 367-369., Institute of Electrical and Electronics Engineers (IEEE), (2015)
L. Prieto, K. Sharma, Y. Wen, and P. Dillenbourg. Proceedings of the 11th International Conference on Computer-Supported Collaborative Learning (CSCL 2015), page 212-219. Gothenburg Sweden, (2015)