@inproceedings{KSXZ:04,
  title = {A Data Streaming Algorithm for Estimating Subpopulation Flow Size Distribution},
  author = {Abhishek Kumar and Minho Sung and Jun Xu and Ellen W. Zegura},
  booktitle = {Proc. of ACM SIGMETRICS},
  month = Jun,
  year = 2005
}