NAHM, Michael. Out of thin air? Apport studies performed between 1928 and 1938 by Elemér Chengery Pap. Journal of Scientific Exploration, [S. l.], v. 33, n. 4, 2019. Disponível em: https://www.journalofscientificexploration.org/index.php/jse/article/view/1575. Acesso em: 24 apr. 2026.