NAHM, Michael. Investigating “physical mediums” via audio signal processing: A comment on Eckhard Kruse’s approach. Journal of Scientific Exploration, [S. l.], v. 32, n. 3, 2018. Disponível em: https://journalofscientificexploration.org/index.php/jse/article/view/1334. Acesso em: 11 may. 2026.