@article{LiLMR19,
  author    = {Hui Li and
               Ye Liu and
               Nikos Mamoulis and
               David S. Rosenblum},
  title     = {Translation-Based Sequential Recommendation for Complex Users on Sparse Data},
  journal   = {{IEEE} Trans. Knowl. Data Eng.},
  year      = {2019}
}
@article{LiLQMTC19,
  author    = {Hui Li and
               Yu Liu and
               Yuqiu Qian and
               Nikos Mamoulis and
               Wenting Tu and
               David W. Cheung},
  title     = {HHMF: Hidden Hierarchical Matrix Factorization for Recommender Systems},
  journal   = {Data Min. Knowl. Discov.},
  year      = {2019}
}
@inproceedings{LiWTM15,
  author = {Hui Li and
            Dingming Wu and
            Wenbin Tang and
            Nikos Mamoulis},
  title = {Overlapping Community Regularization for Rating Prediction in Social
           Recommender Systems},
  booktitle = {RecSys},
  pages = {27--34},
  year = {2015}
}
@inproceedings{LiWM14,
  author = {Hui Li and
            Dingming Wu and
            Nikos Mamoulis},
  title = {A revisit to social network-based recommender systems},
  booktitle = {{SIGIR}},
  pages = {1239--1242},
  year = {2014}
}