@misc{indiciae413d66e3dd8c,
  title = {Upper bounds on lepton-number violating meson decays.},
  author = {LS Littenberg and RE Shrock},
  year = {1992},
  doi = {10.1103/physrevlett.68.443},
  url = {https://pubmed.ncbi.nlm.nih.gov/10045898/},
  note = {Source identifier: 10045898}
}