Lester, J. C., E. Y. Ha, S. Y. Lee, B. W. Mott, J. P. Rowe, and J. L. Sabourin. “Serious Games Get Smart: Intelligent Game-Based Learning Environments”. AI Magazine, Vol. 34, no. 4, Dec. 2013, pp. 31-45, doi:10.1609/aimag.v34i4.2488.