LENNARTSON, Eric. ESPER 2, an improvised oscilloscope music set. Revista Vórtex, [S. l.], v. 9, n. 2, p. 25, 2021. DOI: 10.33871/23179937.2021.9.2.25. Disponível em: https://periodicos.unespar.edu.br/vortex/article/view/4548. Acesso em: 9 out. 2024.