James C AUSTIN. Chronology Protection in the Physical Universe. Current Research Progress in Physical Science Vol. 5, [S. l.], p. 41–61, 2024. DOI: 10.9734/bpi/crpps/v5/2436. Disponível em: https://stm.bookpi.org/CRPPS-V5/article/view/16343. Acesso em: 4 jun. 2026.