BibTex format
@article{Lehners:2019:10.1103/PhysRevD.100.083540,
author = {Lehners, J-L and Stelle, KS},
doi = {10.1103/PhysRevD.100.083540},
journal = {Physical Review D: Particles, Fields, Gravitation and Cosmology},
title = {Safe beginning for the Universe?},
url = {http://dx.doi.org/10.1103/PhysRevD.100.083540},
volume = {100},
year = {2019}
}