Oegema, G. S. (1998). The uses of the shield of David: On heraldic seals and flags, on bible manuscripts, printer's marks and ex libris / Gerbern S. Oegema. Jewish Studies Quarterly.

Oegema, Gerbern S. "The Uses of the Shield of David: On Heraldic Seals and Flags, on Bible Manuscripts, Printer's Marks and Ex Libris / Gerbern S. Oegema." Jewish Studies Quarterly 1998.

Oegema, Gerbern S. "The Uses of the Shield of David: On Heraldic Seals and Flags, on Bible Manuscripts, Printer's Marks and Ex Libris / Gerbern S. Oegema." Jewish Studies Quarterly, 1998.