BibTex format
@article{Cully:2019:10.1109/TKDE.2019.2912367,
author = {Cully, A and Demiris, Y},
doi = {10.1109/TKDE.2019.2912367},
journal = {IEEE Transactions on Knowledge and Data Engineering},
pages = {2000--2013},
title = {Online knowledge level tracking with data-driven student models and collaborative filtering},
url = {http://dx.doi.org/10.1109/TKDE.2019.2912367},
volume = {32},
year = {2019}
}