@inproceedings{kantola20009,
  title = {A Common Numbering Infrastructure for IN and IP Telephony},
  author = {Raimo Kantola and Jos{\'e} Costa-Requena and Nicklas Beijar},
  booktitle = {IN2000},
  year = {2000},
  month = {May},
  address = {Cape Town, South Africa},
}