POLGÁR, S. International Trade and Political Centres in Eastern Europe in the Ninth-Tenth Centuries. Chronica, [S. l.], v. 6, p. 66–71, 2006. Disponível em: https://ojs.bibl.u-szeged.hu/index.php/chronica/article/view/10711. Acesso em: 19 may. 2024.