^Simpson, Grace ; Hawkes, C.F.C ; Hull, M.R. (1979). "Some British and Iberian Penannular Brooches and Other Early Types in the Rhineland and the 'Decumates Agri'". The Antiquaries Journal. 59 (02): 319–342. ISSN0003-5815. {{cite journal}}: |access-date= requires |url= (help)CS1 maint: multiple names: authors list (link)
