@article{AIHPA_1979__31_2_115_0,
     author = {Sanz, J. L.},
     title = {Two charges in an external electromagnetic field : a generalized covariant hamiltonian formulation},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {115--139},
     publisher = {Gauthier-Villars},
     volume = {31},
     number = {2},
     year = {1979},
     mrnumber = {561918},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AIHPA_1979__31_2_115_0/}
}