Guest Editors' Introduction: Intelligent Educational Systems of the Present and Future

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\begin{bibtex} @article{DBLP:journals/expert/AroyoGJ07,

 author    = {Lora Aroyo and
              Arthur C. Graesser and
              W. Lewis Johnson},
 title     = {Guest Editors' Introduction: Intelligent Educational Systems
              of the Present and Future},
 journal   = {IEEE Intelligent Systems},
 volume    = {22},
 number    = {4},
 year      = {2007},
 pages     = {20-21},
 ee        = {http://doi.ieeecomputersociety.org/10.1109/MIS.2007.70},
 bibsource = {DBLP, http://dblp.uni-trier.de}

}

\end{bibtex}