UNIVERSIDAD PONTIFICIA BOLIVARIANA, R. I. Twelve things you should know about Carl Sagan. Ingenio, [S. l.], v. 6, n. 1, p. 12–13, 2020. Disponível em: https://revistas.upb.edu.co/index.php/ingenio/article/view/1528. Acesso em: 28 mar. 2024.