1994 BS series : Broadcasting service (sound): ITU-R recommendations / ITU-R
1995 BS series : Broadcasting service (sound): ITU-R recommendations (new and revised as of 21 October 1995) / International Telecommunication Union
BS series : Broadcasting service (sound): ITU-R reports / ITU-R
BT series : broadcasting service (television): ITU-R report: (BT.2005) / ITU-R