Biggam CP (March 2006). "Whelks and purple dye in Anglo-Saxon England"(PDF). The Archaeo+Malacology Group Newsletter. Glasgow, Scotland, UK: Department of English Language, University of Glasgow (9). 19 Şubat 2011 tarihinde kaynağından(PDF) arşivlendi. Erişim tarihi: 2 Şubat 2024.
Ziderman, I.I. (1986). "Purple dye made from shellfish in antiquity". Review of Progress in Coloration. 16: 46-52. doi:10.1111/j.1478-4408.1986.tb03743.x.
Jacoby D (2004). "Silk economics and cross-cultural artistic interaction: Byzantium, the Muslim world, and the Christian west". Dumbarton Oaks Papers. 58: 210, 197-240. doi:10.2307/3591386. JSTOR3591386.
Jacoby D (2004). "Silk economics and cross-cultural artistic interaction: Byzantium, the Muslim world, and the Christian west". Dumbarton Oaks Papers. 58: 210, 197-240. doi:10.2307/3591386. JSTOR3591386.
Biggam CP (March 2006). "Whelks and purple dye in Anglo-Saxon England"(PDF). The Archaeo+Malacology Group Newsletter. Glasgow, Scotland, UK: Department of English Language, University of Glasgow (9). 19 Şubat 2011 tarihinde kaynağından(PDF) arşivlendi. Erişim tarihi: 2 Şubat 2024.