2.0 2025-04-30 pt 11.0.0 The Unicode Standard, Version 1.1 Internetstiftelsen i Sverige (IIS), “IDN Reference table for Portuguese language” https://github.com/dotse/IDN-ref-tables/blob/master/language-tables/portuguese-lang-ref-table.txt accessed on 2016-10-16 RFC 5891, Internationalized Domain Names in Applications (IDNA): Protocol https://tools.ietf.org/html/rfc5891 ISO/IEC 6937 Third Ed. 2001-12-17- Information technology — Coded graphic character set for text communication — Latin alphabet: Table D.1 (p 35) Use of Latin alphabetic characters. Everson, Michael. The Alphabets of Europe: “Portuguese” https://www.evertype.com/alphabets/portuguese.pdf Everson, Michael. The Alphabets of Europe: “Portuguese” https://www.evertype.com/alphabets/portuguese.pdf Everson, Michael. The Alphabets of Europe: “Portuguese” https://www.evertype.com/alphabets/portuguese.pdf The Unicode Consortium, Common Locale Data Repository (CLDR) Version 28 (2015-09-16) - Locale Data Summary for Portuguese [pt] https://www.unicode.org/cldr/charts/28/summary/pt.html The Unicode Consortium, Common Locale Data Repository (CLDR) Version 28 (2015-09-16) - Locale Data Summary for Portuguese [pt] https://www.unicode.org/cldr/charts/28/summary/pt.html Table “Reduced usage of the letters of the ISO Basic Latin alphabet (A-Z) in various alphabets “ in Wikipedia: “Latin alphabets” https://en.wikipedia.org/wiki/Latin_alphabets Table “Reduced usage of the letters of the ISO Basic Latin alphabet (A-Z) in various alphabets “ in Wikipedia: “Latin alphabets” https://en.wikipedia.org/wiki/Latin_alphabets ISO/IEC 646:1991 — Information technology — ISO 7-bit coded character set for information interchange Wikipedia: “Portuguese orthography” https://en.wikipedia.org/wiki/Portuguese_orthography accessed 2015-10-31. Wiktionary: “ñ” https://en.wiktionary.org/wiki/%C3%B1 accessed 2015-10-31. DNS.PT, Convert domains with special characters (IDN’s) https://www.dns.pt/en/tools/convert-domains-with-special-characters-idn-s/ accessed 2015-11-07