Geodesic
Four-momentum of the~field of a~point charge in nonlinear electrodynamics
Teoretičeskaâ i matematičeskaâ fizika, Tome 191 (2017) no. 3, pp. 417-423

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We prove that the four-momentum of the electromagnetic field of a point charge is a four-vector if the field Lagrangian is nonlinear (with respect to field invariants) and the field mass is finite. We define the class of Lagrangians leading to a bound on the field mass.
Keywords: nonlinear electrodynamics, point charge, field mass, field four-momentum. 
@article{TMF_2017_191_3_a3,
     author = {M. B. Ependiev},
     title = {Four-momentum of the~field of a~point charge in nonlinear electrodynamics},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {417--423},
     publisher = {mathdoc},
     volume = {191},
     number = {3},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2017_191_3_a3/}
}
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M. B. Ependiev. Four-momentum of the~field of a~point charge in nonlinear electrodynamics. Teoretičeskaâ i matematičeskaâ fizika, Tome 191 (2017) no. 3, pp. 417-423. http://geodesic.mathdoc.fr/item/TMF_2017_191_3_a3/