@inproceedings{DBLP:conf/sigir/LiWM14,
  author = {Hui Li and
            Dingming Wu and
            Nikos Mamoulis},
  title = {A revisit to social network-based recommender systems},
  booktitle = {{SIGIR}},
  pages = {1239--1242},
  publisher = {{ACM}},
  year = {2014}
}
@inproceedings{DBLP:conf/recsys/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},
  publisher = {{ACM}},
  year = {2015}
}