@article{CRPHYS_2015__16_10_928_0,
     author = {George F.R. Ellis and Jean-Philippe Uzan},
     title = {Causal structures in inflation},
     journal = {Comptes Rendus. Physique},
     pages = {928--947},
     publisher = {Elsevier},
     volume = {16},
     number = {10},
     year = {2015},
     doi = {10.1016/j.crhy.2015.07.005},
     language = {en},
}