1. G. C. Dunning, ‘Trade relations between England and the continent’, in D. B. Harden (ed.),Dark-age Britain(London, 1956), pp. 218–233 (esp.p. 226).
2. Anglo-Saxon Pottery: A Symposium
3. The Apulia Expedition: An Interim Report
4. Nicolà Vacca,La Ceramica Salentina(Lecce, 1954), pp. 20–21, figs. 16–17.