@inproceedings{PZd15,
  author        = {J. Pang and Y. Zhang},
  title         = {Location prediction: {C}ommunities speak louder than friends},
  booktitle     = {Proc.\ 3rd ACM Conference on Online Social Networks (COSN'15)},
  publisher     = {ACM Press},
  year          = {2015},
  pages         = {161-171}
}