2. "Formar a Vanguarda Revolucionária."Coleção Documentos Básicos no. 1. N.p.:, undated

2. "Formar a Vanguarda Revolucionária."Coleção Documentos Básicos no. 1. N.p.:, 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/376089 Accessed September 26, 2026.