Grierson

Grierson, Philip. Byzantine Coins. (London, 1999).

See |Anonymous| |Byzantine| Class A Folles for Grierson's table of ornaments on class A folles with unlisted Forum additions. 

PDF available online: http://www.doaks.org/resources/publications/doaks-online-publications/byzantine-coinage/byzcoins.pdf

Also see:
Grierson 1976
Grierson Gold
Grierson Medieval
Grierson Mathasuntha
Grierson Counterfeiting