@article{DBLP:journals/ce/McLarenDM11,
author = {Bruce M. McLaren and
Krista E. DeLeeuw and
Richard E. Mayer},
title = {Polite web-based intelligent tutors: Can they improve learning
in classrooms?},
journal = {Computers {\&} Education},
volume = {56},
number = {3},
year = {2011},
pages = {574-584},
ee = {http://dx.doi.org/10.1016/j.compedu.2010.09.019},
bibsource = {DBLP, http://dblp.uni-trier.de}
}