@misc{indiciaef551f03b7542,
  title = {Time-energy Heisenberg-type relations for nonlinear classical fields.},
  author = {L Vásquez},
  year = {1986},
  doi = {10.1103/physrevd.33.2478},
  url = {https://pubmed.ncbi.nlm.nih.gov/9956925/},
  note = {Source identifier: 9956925}
}