On the Exact Solution of a Space- Time Metric Conformal to Minkowskian Manifold Issue:. Al-Nahrain Journal of Science, [S. l.], v. 8, n. 1, p. 57–59, 2018. Disponível em: https://anjs.edu.iq/index.php/anjs/article/view/1592.. Acesso em: 15 may. 2024.