↑Asociación Española de Ingeniería Sísmica et International Association for Earthquake Engineering, Proceedings of the Tenth World Conference on Earthquake Engineering : 19–24 July 1992, Madrid, Spain, Taylor & Francis, , 7000 p. (ISBN978-90-5410-060-7, lire en ligne), p. 40
↑United States. Foreign Broadcast Information Service, Daily Report : Soviet Union, The Service, (lire en ligne), p. 74