DERMEVAL, D. ; LEITE, G. ; ALMEIDA, J. ; ALBUQUERQUE, J. ; PINTO, I. I. B. S. ; SIQUEIRA, S. W. M. ; ISOTANI, S. ; SILVA, A. P. . An ontology-driven software product line architecture for developing gamified intelligent tutoring systems. INTERNATIONAL JOURNAL OF KNOWLEDGE AND LEARNING, v. 12, p. 27-48, 2017. doi: 10.1504/IJKL.2017.088181