RT Journal Article T1 Perturbation theory for an exactly soluble spinor model in interaction with its electromagnetic field A1 Fernández-Rañada, Antonio AB 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. PB American Physical Society SN 0556-2821 YR 1973 FD 1973-11-15 LK https://hdl.handle.net/20.500.14352/64918 UL https://hdl.handle.net/20.500.14352/64918 LA eng NO © 1973 The American Physical Society. We wish to thank Dr. B. Carreras for his help in clarifying several points of this paper through numer ous discussions. DS Docta Complutense RD 5 abr 2025