837-1282 C. CE - Lot of Bulgarian rulers are missing. The city was capital of Bulgaria. Byzantine rule is missing. The city was capital of a Byzantine province called Bulgaria?!?
^The city of Skopje has been known by several names: Iskubia, Scopia, Scupi, Skopia, Skopie, Skopje, Skoplje, Skoplye, Uscub, Uscup, Ushküp, Uskiup, Üsküb, Usküp. See also: Other names of Skopje.
^Webster's Geographical Dictionary, Springfield, Massachusetts, USA: G. & C. Merriam Co., 1960, p. 1052, OCLC3832886, OL5812502M
^Crawford, Steve. The Eastern Front Day by Day, 1941-45: A Photographic Chronology, Potomac Books, 2006, ISBN1597970107, p. 170: "November 13, 1944: Greece, land war. The Bulgarian First Army ejects Army Group E from Skopje although, as most Axis forces have left Greece, this does not trap the army group."
^Stone & Ston; An online database of World War II, books and information on the Web since 1995: War Diary for Monday, 13 November 1944: "German forces withdraw from Skopje as Bulgarian 1st Army advances. Bulgarian 1st Army captures Skopje. Southern flank of the Russian Front, 1944-1945; Balkan campaigns, the Aegean, and the Adriatic, 1942-1945."
^ArchNet.org. "Skopje". Cambridge, Massachusetts, USA: MIT School of Architecture and Planning. Archived from the original on 30 December 2013. Retrieved 29 December 2013.
Edward Brown (1673). "Skopia". A Brief Account of Some Travels in Hungaria, Servia, Bulgaria, Macedonia, Thessaly, Austria, Styria, Carinthia, Carniola, and Friuli. London: Benj. Tooke.
A.J. Evans (1885), "Scupi, Skopia, and the Birthplace of Justinian", Antiquarian Researches in Illyricum, vol. 3–4, England: Nichols & Sons, pp. 79–152, hdl:2027/pst.000006247065
Randall J. Van Vynckt (1996). "Skopje". In Trudy Ring (ed.). Southern Europe. International Dictionary of Historic Places. Vol. 3. Fitzroy Dearborn. OCLC31045650.
Roman A. Cybriwsky (2013). "Skopje". Capital Cities around the World: An Encyclopedia of Geography, History, and Culture. ABC-CLIO. p. 281+. ISBN978-1-61069-248-9.