On the problem of wartime spheres of influence, see Vojtech Mastny, Russia's Road to the Cold War: Diplomacy, Warfare, and the Politics of Communism, 1941-1945. (New York, 1979), pp. 97-110, 117-18, 207-11 and 214. Also see his "Spheres of Interest and Soviet War Aims in 1943," in Eastern Europe in the 1970's ed. S. Sinian, I.