@book {4630,
	title = {Les sceaux byzantins de la collection Henri Seyrig, Biblioth{\`e}que nationale},
	year = {1991},
	pages = {1 vol. (298-XXVIII p. de pl.)},
	isbn = {2-7177-1849-4},
	url = {http://catalogue.bnf.fr/ark:/12148/cb370602829},
	author = {Jean-Claude Cheynet and C{\'e}cile Morrisson and Werner Seibt and Biblioth{\`e}que nationale (France). D{\'e}partement des monnaies, m{\'e}dailles et antiques}
}
