//-->
Regional development strategy in Southeast Europe. A comparative analysis of Albania, Bulgaria, Greece, Romania and Yugoslavia
Hoffman, George Walter, (1972)
Bulgarian economic development since World War II
Dobrin, Bogoslav, (1973)
Politikata na BKP za usŭvŭrshenstvuvane upravlenieto na narodnoto stopanstvo : v pomosht na izuchavashtite ikonomicheskii︠a︡ podkhod i novii︠a︡ ikonomicheski mekhanizŭm
Filipov, Grisha Stanchev, (1980)