@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}, zbl = {0671.70008}, mrnumber = {1002819}, language = {en}, url = {http://www.numdam.org/item/AIHPA_1989__50_2_187_0/} }