Alberto STRUMIA. An Extension of General Relativity Depending on the Independent Powers of R\(_{\mu\nu}\). New Frontiers in Physical Science Research Vol. 3, [S. l.], p. 1–25, 2022. DOI: 10.9734/bpi/nfpsr/v3/3765E. Disponível em: https://stm.bookpi.org/NFPSR-V3/article/view/8586. Acesso em: 12 jun. 2026.