@article{Liu2019a,
  author = "Z. Liu and C. Yang and S. Rüdian and S. Liu and L. Zhao and T. Wang",
  title = "Temporal emotion-aspect modeling for discovering what students are concerned about in online course forums",
  year = 2019,
  journal = "Interactive Learning Environments, 27:5-6",
  pages = "598-627",
  month = "Apr",
  doi = "10.1080/10494820.2019.1610449"
}


@inproceedings{Liu2018d,
  author = "Z. Liu and T. Wang and N. Pinkwart and S. Liu and L. Kang",
  title = "An Emotion Oriented Topic Modeling Approach to Discover What Students are Concerned about in Course Forums",
  year = 2018,
  booktitle = "Proceedings of the 2018 IEEE 18th International Conference on Advanced Learning Technologies (ICALT)",
  pages = "170-172",
  doi = "10.1109/ICALT.2018.00047"
}