Islamic Seals Database, Chester Beatty Library Dublin. Crowd-sourced cataloging project, available at: http://www.cbl.ie/islamicseals/Home.aspx
Ottoman Sultan Tugras, 2002. The Turkish-English website is the labor of love of Ercan Mensiz; available at: http://www.tugra.org
Dagmar A. Riedel
Last updated, 9 February 2015