Fischer, Horst; McDonald, Avril; Dugard, John; Hans-Peter Gasser; Christopher Greenwood; Hortensia Gutierrez Posse; G. Herczeg; William Fenrick (23 May 2004). Yearbook of International Humanitarian Law. Cambridge University Press. p. 539. ISBN978-90-6704-169-0. Retrieved 5 January 2011.