The Macedonian Federative Organization (Bulgarian and Macedonian: Македонска федеративна организация/организација; MFO/МФО) was established in Sofia in 1921 by former Internal Macedonian Revolutionary Organization (IMRO) left-wing's activists.[1][2]
- ^ "Д. Тюлеков - ВМРО в Пиринско, 1919-1934 г. - 1.1". www.promacedonia.org. Retrieved 2020-08-15.
- ^ p. Das makedonische Jahrhundert: von den Anfängen der nationalrevolutionären Bewegung zum Abkommen von Ohrid 1893-2001; Stefan Troebst, Oldenbourg Wissenschaftsverlag, 2007, ISBN 3-486-58050-7, p. 420.