SINGH, A.; MISHRA, R. K.; PANDEY, A. 4D-Space-Time Geometry & Cosmological Constant. JOURNAL OF ADVANCES IN MATHEMATICS, [S. l.], v. 7, n. 1, p. 1135–1139, 2014. DOI: 10.24297/jam.v7i1.2579. Disponível em: https://rajpub.com/index.php/jam/article/view/2579. Acesso em: 22 nov. 2024.