↑ Buzar, Benedito (December 11, 2008). "100 anos de Vitorino Freire"(PDF). Diário da Assembleia (in Portuguese). Assembleia Legislativa do Estado do Maranhão. pp.33–36. Archived from the original(PDF) on 2011-07-06. Retrieved 2014-01-09.
↑ Scarano, Júlia Maria Leonor. Grandes Personagens da Nossa História. São Paulo: Abril Cultural, 1969. (Portuguese)
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