TismaneanuI, Vladimir, ed. (2011). "Crisis, Illusion and Utopia". Promises of 1968: Crisis, Illusion and Utopia (NED – New edition, 1 ed.). Central European University Press. ISBN978-6155053047. JSTOR10.7829/j.ctt1281xt.[page needed]
Dubček, Alexander (10 April 1968). Kramer, Mark; Moss, Joy (eds.). "Akční program Komunistické strany Československa". Action Program (in Czech). Translated by Tosek, Ruth. Rudé právo. pp. 1–6. Archived from the original on 6 May 2008. Retrieved 21 February 2008.
Derasadurain, Beatrice. "Prague Spring". thinkquest.org. Archived from the original on 14 November 2007. Retrieved 23 January 2008.
Dubček, Alexander (10 April 1968). Kramer, Mark; Moss, Joy (eds.). "Akční program Komunistické strany Československa". Action Program (in Czech). Translated by Tosek, Ruth. Rudé právo. pp. 1–6. Archived from the original on 6 May 2008. Retrieved 21 February 2008.
Derasadurain, Beatrice. "Prague Spring". thinkquest.org. Archived from the original on 14 November 2007. Retrieved 23 January 2008.
Andropov to the Central Committee. The Demonstration in Red Square Against the Warsaw Pact Invasion of Czechoslovakia. 20 September 1968, at Andrei Sakharov's archive, in Russian and translation into English, Yale.eduArchived 12 October 2007 at the Wayback Machine
Andropov to the Central Committee. The Demonstration in Red Square Against the Warsaw Pact Invasion of Czechoslovakia. 20 September 1968, at Andrei Sakharov's archive, in Russian and translation into English, Yale.eduArchived 12 October 2007 at the Wayback Machine