About the Unicode Character Database| www.unicode.org
Unicode® Standard Annex #31| www.unicode.org
Unicode® Technical Standard #18| www.unicode.org
Proposed New Characters: The Pipeline| www.unicode.org
Unicode glossary| www.unicode.org
Unicode® Standard Annex #44| www.unicode.org
Unicode® Technical Standard #18| unicode.org
Specifies the Unicode Normalization Formats| www.unicode.org