BibTex format
@article{de:2020:10.1103/PhysRevD.102.084048,
author = {de, Rham C and Tolley, AJ},
doi = {10.1103/PhysRevD.102.084048},
journal = {PHYSICAL REVIEW D},
pages = {1--33},
title = {Causality in curved spacetimes: The speed of light and gravity},
url = {http://dx.doi.org/10.1103/PhysRevD.102.084048},
volume = {102},
year = {2020}
}