Rainer BURGHARDT. Einstein’s Elevator in Cosmology. Newest Updates in Physical Science Research Vol. 5, [S. l.], p. 121–131, 2021. DOI: 10.9734/bpi/nupsr/v5/8413D. Disponível em: https://stm.bookpi.org/NUPSR-V5/article/view/1402. Acesso em: 30 jun. 2026.