Amnesty International. Report 1988. London: Amnesty International Publications, 1988. 196-198.

. The Imprisonment of Persons Seeking to Leave a Country or to Return to Their Own Country. London: Amnesty International International Secretariat, 1986. 7-8.

U.S. Department of State. Country Reports on Human Rights Practices for 1988. Washington: U.S. Government Printing Office, 1989. 1017-1030.

"Czechoslovakia", Europa Yearbook 1988. London: Europa Publications Ltd, 1988. 854-874.

Human Rights Watch. Annual Report 1987. 64-66.

Hurst Hannum. The Right to Leave and Return in International Law and Practice. Boston: Martinus Nijhoff Publishers, 1987. 96-105.

Czechoslovak Helsinki Committee. Human Rights in Czechoslovakia 1988. Vienna: International Helsinki Federation for Human Rights, 1989.