GOODMAN, J. Gravity. JOURNAL OF ADVANCES IN PHYSICS, [S. l.], v. 13, n. 2, p. 4689–4691, 2017. DOI: 10.24297/jap.v13i2.5869. Disponível em: https://www.rajpub.com/index.php/jap/article/view/5869. Acesso em: 20 may. 2024.