5. Amnistía Internacional. "El uso de la violencia: Nota aclaratoria." Londres:, undated

5. Amnistía Internacional. "El uso de la violencia: Nota aclaratoria." Londres:, undated, Box: 28. Eduardo Sarno Collection of Leftist Movements in Brazil, 2002-03. Benson Latin American Collection, The University of Texas at Austin. https://archives.lib.utexas.edu/repositories/4/archival_objects/376086 Accessed September 26, 2026.