@article{383144,
      recid = {383144},
      author = {Johnston, Alan B.},
      title = {SIP understanding the Session Initiation Protocol /  [electronic resource] :},
      publisher = {Artech House,},
      address = {Boston, Mass. :},
      pages = {xxix, 395 p. :},
      year = {2009},
      url = {http://library.usi.edu/record/383144},
}