Michael R. Beschloss and Strobe Talbott, At the Highest Levels: The Inside Story of the End of the Cold War, Little Brown (London) 1993, pp. 128-9 and 160. OCLC26809965
James Baker, The Politics of Diplomacy: Revolution, War and Peace, 1989-1992, Putnam (New York) 1995, p.169. OCLC32349299