@MANUAL{Ruiz-Agundez2009Edits,
  title = {Edits of: Service Specification - {V}oice over {IP} ({VoIP})},
  author = {Igor Ruiz-Agundez},
  organization = {TeleManagement Forum},
  edition = {http://tmforum.org/},
  year = {2009},
  owner = {igor.ira},
  timestamp = {2009.05.12}
}