DIEP, D. N.; DUC, D. V.; TAN, H. V.; VIET, N. A. Field Equations in General Relativity with Internal Symmetry. Communications in Physics, [S. l.], v. 20, n. 2, p. 113, 2012. DOI: 10.15625/0868-3166/20/2/2158. Disponível em: https://vjs.ac.vn/index.php/cip/article/view/2158. Acesso em: 28 mar. 2024.