Горбачев и Ельцин как лидеры

Zimmerman 1969 – Zimmerman W. Soviet Perspectives on International Relations, 1956–1967. Princeton, NJ: Princeton University Press, 1969.

Zlotnik 1999 – Zlotnik M. Yeltsin and Gorbachev: The politics of confrontation. Unpublished manuscript, 1999.