@article{AIHPA_1989__50_2_187_0,
     author = {Droz-Vincent, Philippe},
     title = {Two-body relativistic systems in external field},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {187--204},
     publisher = {Gauthier-Villars},
     volume = {50},
     number = {2},
     year = {1989},
     mrnumber = {1002819},
     zbl = {0671.70008},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1989__50_2_187_0/}
}