@article{chen2016peakvizor,
    title={Peakvizor: Visual analytics of peaks in video clickstreams from massive open online courses},
    author={Chen, Qing and Chen, Yuanzhe and Liu, Dongyu and Shi, Conglei and Wu, Yingcai and Qu, Huamin},
    journal={IEEE Transactions on Visualization and Computer Graphics},
    number={10},
    pages={2315--2330},
    year={2016},
    publisher={IEEE}
}