Zoellick, Robert B. (Fall 2000). "The Lessons of German Unification". The National Interest. No. 61. pp. 21–22. – via Charles University. "In recent years, some have argued that U.S. commitments to the Soviets included a promise not to enlarge NATO. I adamantly disagree, in part because I recall anticipating the possibility of Poland and others joining NATO and so I wanted to avoid taking any action that would preclude that option."
doi.org
doi.org
Kramer, Mark; Shifrinson, Joshua R. Itzkowitz (). „NATO Enlargement – Was There a Promise?”. International Security. 42 (1): 186–192. doi:10.1162/isec_c_00287. ISSN0162-2889.
Shifrinson, Joshua R. Itzkowitz (). „Deal or No Deal? The End of the Cold War and the U.S. Offer to Limit NATO Expansion”. International Security. 40 (4): 7–44. doi:10.1162/ISEC_a_00236.
Kramer, Mark; Shifrinson, Joshua R. Itzkowitz (). „NATO Enlargement – Was There a Promise?”. International Security. 42 (1): 186–192. doi:10.1162/isec_c_00287. ISSN0162-2889.
