@incollection{Li12,
author = {Xia Mao and Zheng Li},
title = {Multimodal Intelligent Tutoring Systems},
booktitle = {E-Learning},
publisher = {IntechOpen},
address = {Rijeka},
year = {2012},
editor = {Elvis Pontes and Anderson Silva and Adilson Guelfi and Sergio Takeo Kofuji},
chapter = {6},
doi = {10.5772/29041},
url = {https://doi.org/10.5772/29041}
}