A SIP Response Code for Unwanted Calls. Schulzrinne, H. Technical Report 8197, IETF, July, 2017.
A SIP Response Code for Unwanted Calls [txt]Paper  bibtex   
@techreport{RFC8197,
  title = {{A SIP Response Code for Unwanted Calls}},
  author = {Schulzrinne, H.},
  type = {RFC},
  number = {8197},
  institution = {IETF},
  month = jul,
  year = 2017,
  url = {http://tools.ietf.org/rfc/rfc8197.txt},
}

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