@mastersthesis{ipana-inmaculadadt,
  author = {Inmaculada Espigares del Pozo},
  title = {An Implementation of the Internet Call Waiting Service using SIP},
  school = {Helsinki University of Technology},
  year = {1999},
  month = {December},
  address = {Helsinki University of Technology, Laboratory of Telecommunications technology, P.O. Box 3000, 02015 HUT, Finland},
  country = {Finland},
}