@misc{indiciae4840b9a8a58e,
  title = {Bound-state problem in quantum field theory: Linear and nonlinear dynamics.},
  author = {LS Celenza and CR Ji and CM Shakin},
  year = {1987},
  doi = {10.1103/physrevd.36.2506},
  url = {https://pubmed.ncbi.nlm.nih.gov/9958459/},
  note = {Source identifier: 9958459}
}