A Study of some Cosmological Parameters at Different Eras of the Universe. Rafidain Journal of Science, [S. l.], v. 25, n. 1, p. 108–119, 2014. DOI: 10.33899/rjs.2014.86090. Disponível em: https://rsci.uomosul.edu.iq/index.php/rsci/article/view/46936. Acesso em: 28 jul. 2026.