NEVES, Rafael. Grupo OPNI graffiti and urban violence in present-day Brazil. SAUC - Street Art and Urban Creativity (repository), [S. l.], v. 4, n. 2, 2018. DOI: 10.25765/sauc.v4i2.153. Disponível em: https://journals.wisethorough.com/index.php/sauc/article/view/153. Acesso em: 30 apr. 2026.