GRABOI, Dan. Where is "Out There"?. Journal of Scientific Exploration, [S. l.], v. 38, n. 4, p. 636–652, 2024. DOI: 10.31275/20243237. Disponível em: https://www.journalofscientificexploration.org/index.php/jse/article/view/3237. Acesso em: 24 apr. 2026.