[MSDN Library June 1998] GSUB: Glyph Substitution (100%)

MSDN Library Visual Studio 6.0 > Specifications > Applications > TrueType Font Specifications > Far East TrueType Font Files > Implementing TrueType Fonts (TTFs)

[MSDN Library June 1998] GSUB Header (28.4455128205128%)

MSDN Library Visual Studio 6.0 > Specifications > Applications > TrueType Open Font > 3. The Glyph Substitution Table (GSUB)

[MSDN Library June 1998] GSUB Subtable Examples (28.4455128205128%)

MSDN Library Visual Studio 6.0 > Specifications > Applications > TrueType Open Font > 3. The Glyph Substitution Table (GSUB)