@techreport{beijar_enum,
  author = {Nicklas Beijar},
  title = {TRIP, ENUM and Number Portability},
  booktitle = {IP Telephony Protocols, Architectures and Issues},
  year = {2001},
  month = {April},
  type = {Licentiate course on Telecommunications Technology},
  url = {http://www.netlab.hut.fi/opetus/s38130/k01/Papers/Beijar-TripEnumNp.pdf},
}