Required:
Eduard Mark, "Revolution By Degrees: Stalin's National-Front Strategy for Europe, 1941-1947," Cold War International History Project, Working Paper no. 31, pp. 5-46 (pdf).

John Lewis Gaddis, The United States and the Origins of the Cold War, 1941-1947 (New York: Oxford University Press, 1972), pp. 198-243, 244-63 (pdf).

Suggested:
John Lewis Gaddis, The United States and the Origins of the Cold War, 1941-1947 (New York: Oxford University Press, 1972).

Melvyn P. Leffler and David S. Painter, eds., Origins of the Cold War: An International History (New York: Routledge, 1994).

David Reynolds, ed., The Origins of the Cold War in Europe: International Perspectives (New Haven: Yale University Press, 1994).