%0 Journal Article %A Fernández-Rañada, Antonio %T Perturbation theory for an exactly soluble spinor model in interaction with its electromagnetic field %D 1973 %@ 0556-2821 %U https://hdl.handle.net/20.500.14352/64918 %X A nonlinear spinor field is studied interacting at rest with the static radial electromagnetic potential, c4 p. The results of perturbation theory fully agree with the exact results previously obtained. %~