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Watts, Meredith W.; Ferro, Simone Linhares (August 1, 2012). "The Coexistence of Folk and Popular Culture as Vehicles of Social and Historical Activism: Transformation of the Bumba-meu-boi in Northeast Brazil". The Journal of Popular Culture. 45 (4): 883–901. doi:10.1111/j.1540-5931.2012.00963.x. ISSN1540-5931.