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WikiPedia: Romanos_I_Lekapenos http://books.google.com/?id=XHVzWN6gqxQC http://books.google.com/books?id=AYpqikYr3Q8C&pg=P... http://books.google.com/books?id=ohFJD_QT3E8C&pg=P... http://pt.scribd.com/doc/43932713/Cambridge-Histor... http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?... https://aleph.nkp.cz/F/?func=find-c&local_base=aut... https://catalogue.bnf.fr/ark:/12148/cb13321403w https://data.bnf.fr/ark:/12148/cb13321403w https://www.idref.fr/035494484 https://id.loc.gov/authorities/names/n87944154