Dr. Ivan Yanev Bulgaria's Foreign Policy During the Second World War as Reflected in Bulgarian Historic Literature 1938-1944 Варна, 2006 Издателство "Литернет", Bezmonitor.com
Gordon, Raymond G., Jr. (ed.) (2005). “Ethnologue: Languages of the World”. SIL International. 2010년 7월 13일에 확인함. Immigrant languages: Greek" "Adyghe [ady] A few villages in Macedonia. Alternate names: Adygey, West Circassian
“Note on Yugoslavia”. 2008년 5월 10일에 확인함. "By resolution A/RES/47/225 of 8 April 1993, the General Assembly decided to admit as a Member of the United Nations the State being provisionally referred to for all purposes within the United Nations as the former Yugoslav Republic of Macedonia pending settlement of the difference that had arisen over its name."