Francesco Bellotti Riccardo Berta Alessandro De Gloria Ludovica Primavera Adaptive Experience Engine for Serious Games. 264-280 2009 1 IEEE Trans. Comput. Intellig. and AI in Games 4 http://dx.doi.org/10.1109/TCIAIG.2009.2035923 db/journals/tciaig/tciaig1.html#BellottiBGP09