10. Martins, Roberto R. "A esquerda brasileira sob a ditadura militar: 1964-1985." N.p.:, 1986 August.

10. Martins, Roberto R. "A esquerda brasileira sob a ditadura militar: 1964-1985." N.p.:, 1986 August., Box: 5. 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/372177 Accessed September 27, 2026.