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WikiPedia: Boris Velchev http://personi.dir.bg/person.php?id=146 http://www.mediapool.bg/prezidentat-nominira-boris... http://www.segabg.com/article.php?issueid=2107&sec... http://worldcat.org/identities/lccn-n2008014243/ https://web.archive.org/web/20141026094306/http://...