@article{690100,
      recid = {690100},
      author = {Tschofenig, Hannes. and Schulzrinne, Henning.},
      title = {Internet protocol-based emergency services [electronic  resource] /},
      publisher = {John Wiley & Sons Inc.,},
      address = {Chichester, West Sussex :},
      pages = {xxxiii, 367 p. :},
      year = {2013},
      url = {http://library.usi.edu/record/690100},
}