Øyvind G. GRØN. Stiff Matter in the Universe. Physical Science: New Insights and Developments Vol. 1, [S. l.], p. 59–74, 2025. DOI: 10.9734/bpi/psniad/v1/5185. Disponível em: https://stm.bookpi.org/PSNIAD-V1/article/view/18240. Acesso em: 10 jun. 2026.