Allan Chester Johnson, Paul Robinson Coleman-Norton, Frank Card Bourne, Clyde Pharr, Ancient Roman Statutes: A Translation with Introduction, Commentary, Glossary, and Index(The Lawbook Exchange, Ltd., 1961)p 222.
James S Reid, The Municipalities of the Roman Empire (CUP, 1913), p441.
Mary Taliaferro Boatwright, Hadrian and the Cities of the Roman Empire (Princeton University Press, 2002) p44.