[1] [CITE[ETS 300 706 - Enhanced Teletext specification - ets_300706e01p.pdf]], [TIME[2000-02-02T20:07:05.000Z]], [TIME[2020-10-25T01:13:48.184Z]] <https://www.etsi.org/deliver/etsi_i_ets/300700_300799/300706/01_60/ets_300706e01p.pdf>

[2] [CITE@en[World System Teletext - Wikipedia]], [TIME[2020-12-03T15:26:32.000Z]], [TIME[2020-12-05T05:17:50.170Z]] <https://en.wikipedia.org/wiki/World_System_Teletext>

[3] [CITE[Wayback Machine]], [TIME[2020-12-05T05:18:15.000Z]] <https://web.archive.org/web/20160326062859/https://www.phecap.nl/download/enhenced-teletext-specs.pdf>

[4] ≠ [[Teletex]]

[5] [CITE[25_524.pdf]], [TIME[2022-12-11T07:40:06.000Z]] <https://www.jstage.jst.go.jp/article/sicejl1962/25/6/25_6_524/_pdf>