FERREIRA, Juliana Mesquita Hidalgo. Johann Zöllner: Fourth Dimention and Spiritual Phenomena in the end of Nineteenth Century. Circumscribere International Journal for the History of Science, [S. l.], v. 3, p. 20–42, 2008. Disponível em: https://revistas.pucsp.br/index.php/circumhc/article/view/570. Acesso em: 6 dec. 2025.