[1] Guide to the use of Character Sets in Europe, 1998-09-28T00:00:00.000Z, 2020-12-05T03:32:54.958Z http://std.dkuug.dk/cen/tc304/guide/gis10538.htm

[3] KS X 1019:1994

[2] ISO/IEC 6429 の亜種。