Sebastián, G.; Tesoriero, R.; Gallud, J. A. Modeling Language-Learning Applications. IEEE Latin Ameriaca Transcations. Vol. 15. No. 9, pp. 1771-1776. 2017. DOI: doi: 10.1109/TLA.2017.8015084.

Link: http://ieeexplore.ieee.org/document/8015084/