References
- W.G. Boskoff, Constant Gaussian curvature, FLRW conditions and a universe without matter, International Journal of Geometric Methods in Modern Physics, 19(11), 2022;
- W.G. Boskoff, A universe without time produced by a disappearing worm-hole, International Journal of Geometric Methods in Modern Physics, 21(06), 2024;
- W.G. Boskoff, A family of timeless six-dimensional universes, International Journal of Geometric Methods in Modern Physics, 2025;
- W.G. Boskoff, S. Capozziello, A Mathematical Journey to Relativity, Second Edition, Unitext for Physics, Springer, 2024;
- K. Gödel, An example of a new type of cosmological solutions of Einstein’s field equations of gravitation, Reviews of Modern Physics, vol. 21, no. 3, 447–450, 1949;
- S. Green, R. Wald, How well is our Universe described by an FLRW model?, Classical and Quantum Gravity, vol. 31, issue 23, 2014;
- H. Stephani, D. Kramer, M. MacCallum, C. Hoenselaers, E. Herlt, Exact Solutions of Einstein’s Field Equations, Second Edition, Cambridge University Press, Cambridge, 2003;
- S. Weinberg, Cosmology, Oxford University Press, Oxford, 2008.