https://www.w3.org/1999/07/REC-MathML-19990707/chap6/ISOAMSO1.html
ISOAMSO Characters
characters
https://www.w3.org/1999/07/REC-MathML-19990707/chap6/ISOAMSO2.html
ISOAMSO Characters and Glyphs
charactersglyphs
https://www.w3.org/1999/07/REC-MathML-19990707/chap6/ISOAMSOe2.html
ISOAMSO Characters Extended and Glyphs
charactersextendedglyphs
https://www.w3.org/TR/REC-MathML/chap6/ISOAMSO1.html
ISOAMSO Characters
characters
https://www.w3.org/TR/REC-MathML/chap6/ISOAMSO2.html
ISOAMSO Characters and Glyphs
charactersglyphs