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WikiPedia: Boris III của Bulgaria http://mahatma.blog.bg/politika/2011/01/27/tzar-ts... http://sofiaecho.com/2003/03/13/638240_tsar-boris-... http://vimeo.com/25341520 http://isurvived.org/Rightheous_Folder/Tsar_Boris-... http://purl.org/pressemappe20/folder/pe/002192 https://www.imdb.com/title/tt2153626/ https://www.scribd.com/doc/950652/The-Rescue-of-th... https://web.archive.org/web/20110908140444/http://... https://web.archive.org/web/20170811234636/http://... https://web.archive.org/web/20170917121427/http://...