“The case of the ‘Som Imaginário’ band: : counterculture, experimentation and the music industry between the 1960s and 1970s in Brazil”, Per musi, no. 30, pp. 1–11, Nov. 2014, Accessed: Oct. 04, 2025. [Online]. Available: https://periodicos-hml.cecom.ufmg.br/index.php/permusi/article/view/38864