ボグダン・フィロフ
↑ Holocaust Encyclopaedia: Bulgaria Archived 2009年5月6日, at the Wayback Machine.
↑ The Holocaust of Jews from Trakia and Macedonia
↑ "100 Death Sentences", TIME Magazine, February 12, 1945
Bulgaria in the Second World War by Marshall Lee Miller, Stanford University Press, 1975.
Royalty in Exile by Charles Fenyvesi, London, 1981, pps:153-171 - "Czar Simeon of the Bulgars". ISBN 978-0-86051-131-1