If the reader wants to know the details of GKT, please refer to the Appendix of the paper: Graph-based Knowledge Tracing: Modeling Student Proficiency Using Graph Neural Network.
@inproceedings{nakagawa2019graph,
title={Graph-based knowledge tracing: modeling student proficiency using graph neural network},
author={Nakagawa, Hiromi and Iwasawa, Yusuke and Matsuo, Yutaka},
booktitle={2019 IEEE/WIC/ACM International Conference on Web Intelligence (WI)},
pages={156--163},
year={2019},
organization={IEEE}
}