Bucciarelli, R., Capone, R., Tortoriello, F. S., Greco, M., Savarese, G. and Enriquez, J. (2019) “Learning Analytics - Scientific Description and Heuristic Validation of Languages NLG”, Journal of e-Learning and Knowledge Society, 15(3), pp. 251-261. doi: 10.20368/1971-8829/1135040.