MAY, Edwin C.; SPOTTISWOODE, S. James P. The Global Consciousness Project: Identifying the Source of the Psi. Journal of Scientific Exploration, [S. l.], v. 25, n. 4, 2011. Disponível em: https://www.journalofscientificexploration.org/index.php/jse/article/view/14. Acesso em: 14 may. 2026.