- [8] UAX #44: Unicode Character Database, , https://www.unicode.org/reports/tr44/#Property_Value_Aliases
- [2] UAX #44: Unicode Character Database, , https://www.unicode.org/reports/tr44/#ArabicShaping.txt
- [1] UAX #44: Unicode Character Database, , https://www.unicode.org/reports/tr44/#Derived_Extracted
- [4] , https://www.unicode.org/Public/UCD/latest/ucd/ArabicShaping.txt
- [5] , https://www.unicode.org/Public/UCD/latest/ucd/extracted/DerivedJoiningGroup.txt
- [6] , https://www.unicode.org/Public/UCD/latest/ucd/extracted/DerivedJoiningType.txt