FULFORD, Michael. Byzantium and Britain: a Mediterranean perspective on Post-Roman Mediterranean Imports in Western Britain and Ireland [online]. Archaeology Service [cit. 2015-12-03]. Dostupné online.
archive.org
JONES, Barri; MATTINGLY, David. An Atlas of Roman Britain. Cambridge: Wiley-Blackwell, 1990. Dostupné online. ISBN978-1-84217-067-0. Kapitola Britain Before the Conquest: Urbanization, s. 47–55.
PAYTON, Philip John. Modern Cornwall: The changing nature of peripherality. [s.l.]: University of Plymouth, 1989. Dostupné v archivu pořízeném z originálu dne 2014-10-06. Kapitola Chapter three: The Celtic Duchy.Archivováno 6. 10. 2014 na Wayback Machine.
roman-britain.co.uk
The Dumnonii [online]. Roman-Britain.co.uk, 2011 [cit. 2007-11-25]. Kapitola British Tribes. Dostupné online.
web.archive.org
A history of Cornish mining. www.trevithick-society.org.uk [online]. [cit. 2020-08-02]. Dostupné v archivu pořízeném dne 2009-08-12.
BONIFAY, Michel. Review Article Post-Roman imports in the British Isles: material and place [online]. Antiquity [cit. 2015-12-03]. Dostupné v archivu pořízeném dne 2015-12-08.
PAYTON, Philip John. Modern Cornwall: The changing nature of peripherality. [s.l.]: University of Plymouth, 1989. Dostupné v archivu pořízeném z originálu dne 2014-10-06. Kapitola Chapter three: The Celtic Duchy.Archivováno 6. 10. 2014 na Wayback Machine.