@article{AIHPA_1990__53_3_319_0,
     author = {Alertz, Birgitta},
     title = {Electrodynamics in {Robertson-Walker} spacetimes},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {319--342},
     publisher = {Gauthier-Villars},
     volume = {53},
     number = {3},
     year = {1990},
     mrnumber = {1084883},
     zbl = {0709.53054},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1990__53_3_319_0/}
}