@INPROCEEDINGS{Marshi:VoIP,
  AUTHOR = {Ian Marsh and Fengyi Li},
  TITLE = {A VoIP Measurement Infrastructure},
  BOOKTITLE = {Sixteenth Nordic Teletraffic Seminar},
  ADDRESS = {Espoo, Finland},
  YEAR = {2002},
  MONTH = AUG,
  PAGES = 337--348,
  URL = {http://www.sics.se/~ianm/Publications/ipquality.ps}
}