Lesnefsky, J. E.; Easson, D. A.; Davies, P. C. W. (2023). "Past-completeness of inflationary spacetimes". Physical Review D. 107 (4): 044024. arXiv:2207.00955. doi:10.1103/PhysRevD.107.044024.
Lesnefsky, J. E.; Easson, D. A.; Davies, P. C. W. (2023). "Past-completeness of inflationary spacetimes". Physical Review D. 107 (4): 044024. arXiv:2207.00955. doi:10.1103/PhysRevD.107.044024.